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Expediente PF26-9-000 de FERC · Desert Southwest Expansion

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155 documentos · el más reciente 21 oct 2026 · revisado 23 oct 2026

octubre de 2026

  1. Comentarios del público

    Comentario de una persona del público

    1. Re: [Docket No. PF26-9-000 — Desert Southwest Expansion Project / correct docket] I own property at [address] in Hueco Mountain Estates, El Paso County, Texas, where I have lived since 2006. I oppose the proposed route of Transwestern … Leer todo

      Re: [Docket No. PF26-9-000 — Desert Southwest Expansion Project / correct docket] I own property at [address] in Hueco Mountain Estates, El Paso County, Texas, where I have lived since 2006. I oppose the proposed route of Transwestern Pipeline because of its proximity to Hueco Tanks State Park and Historic Site and its harm to Hueco Mountain Estates and its property owners. The proposed route passes approximately .02 miles from Hueco Tanks, which is listed on the National Register of Historic Places and holds one of the largest concentrations of pictographs in North America, including more than 200 painted masks. The site remains sacred to several tribes, including Ysleta del Sur Pueblo and the Mescalero Apache. I volunteer as a rock art guide in the park and see firsthand how fragile these resources are. I ask that the environmental review fully evaluate effects on the park and its surroundings under Section 106 of the National Historic Preservation Act, including construction vibration, dust, ground disturbance of unrecorded archaeological sites near the park, and the visual setting that defines the site’s character. I also ask that all affected tribes be meaningfully consulted. Hueco Mountain Estates is a residential community of hundreds of properties. A high-pressure, large-diameter gas line this close to homes poses risks that a route through unpopulated land would not. Owners here bought in a rural setting next to a protected historic site. The pipeline would reduce property values and burden owners with permanent easement restrictions, whether or not their own parcels are crossed. An alternative route along the west side of the Hueco Mountains would avoid both the park and Hueco Mountain Estates. I ask that the environmental document compare alternatives that avoid Hueco Tanks and Hueco Mountain Estates, and that the Commission require the applicant to adopt one. [name] [name] 10/20/2026

      Original en FERC · 20261021-5006 ↗
  2. Office of Energy Projects

    Letter to Transwestern Pipeline Company, LLC providing comments from FERC staff re the draft Resource Reports 1, 5, 10, and 11 for the planned Desert Southwest Expansion Project under PF26-9.

    Comentarios del personal de FERC sobre los borradores de la empresa.

  3. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Monthly Progress Report No. 6 for the period of 09/12/2026 to 10/08/2026 re the proposed Desert Southwest Expansion Project under PF26-9.

  4. Comentarios del público

    Comentario de una persona del público

    1. To: Federal Energy Regulatory Commission (FERC) Re: Desert Southwest Expansion Project Docket No.: PF26-9-000 Subject: Formal Landowner Objection — Proposed 300-Foot Restricted Area, Access, and Property Rights To the Federal Energy … Leer todo

      To: Federal Energy Regulatory Commission (FERC) Re: Desert Southwest Expansion Project Docket No.: PF26-9-000 Subject: Formal Landowner Objection — Proposed 300-Foot Restricted Area, Access, and Property Rights To the Federal Energy Regulatory Commission: I am a one-third owner of approximately ten acres of privately owned property in Luna County, New Mexico, that would be affected by Transwestern Pipeline Company's proposed Desert Southwest Expansion Project. I am submitting this formal comment to request FERC's review of the proposed pipeline location, the necessity of the 300-foot-wide restricted area, and the significant property restrictions Transwestern is seeking. 1. Proposed 300-Foot Restricted Area Transwestern has presented an easement agreement that would allow the company to restrict a 300-foot-wide area of our property for a four-year selection period. During that period, Transwestern would have substantial rights affecting our use of the property while retaining the ability to select the final easement location. I request that FERC determine whether this particular width, duration, and location are required by federal regulation or whether they are proposed by Transwestern for its own planning and construction purposes. 2. Statements Regarding FERC Requirements Transwestern's land representative informed me that FERC required the proposed restricted area and its location. I request written clarification of whether FERC has specifically directed Transwestern to use this particular location and 300-foot-wide area on our property. If the location and width were selected by Transwestern, I request that the company be required to explain the engineering, safety, and environmental reasons for its selection and evaluate reasonable alternatives. 3. Existing Property Access The proposed restricted area affects the existing road used to access our property. The easement agreement contains provisions addressing construction, roads, crossings, and limitations on property use. I am concerned that these provisions could interfere with continued access, road maintenance, future improvements, and emergency vehicle access. I request that FERC evaluate these impacts and require appropriate measures to preserve reasonable, uninterrupted property access. 4. Future Utility Installation and Development The proposed restrictions could interfere with installing electric, water, and other utility services and could affect future residential development. I request that Transwestern identify how utility crossings, access improvements, and reasonable development of the remaining property would be accommodated. 5. Temporary Construction Activities and Ground Disturbance The proposed agreement grants rights involving temporary construction workspace, excavation, grading, equipment access, vegetation removal, and restoration. I request that FERC evaluate the full extent of anticipated temporary ground disturbance, including potential soil compaction, erosion, drainage changes, road damage, and restoration requirements. I also request that the company clearly identify the boundaries and expected duration of each temporary construction area. 6. Alternative Route Along the Southern Property Boundary I request evaluation of a route and construction arrangement closer to the southern property boundary that would minimize interference with the existing access road and reduce restrictions on the remainder of the property. If Transwestern considers this alternative infeasible, I request that the reasons be documented. 7. Request for Review and Response I respectfully request that FERC: - Include these objections in the environmental review record. - Evaluate whether the proposed 300-foot restricted area is necessary and appropriately located. - Require Transwestern to explain the basis for its proposed restrictions and evaluate reasonable alternatives. - Examine impacts on property access, utilities, ground disturbance, and restoration. - Consider appropriate mitigation measures to protect the affected landowners. I am not categorically opposed to the pipeline project. I am seeking a reasonable arrangement that protects our property rights and avoids unnecessary impacts. I reserve all rights concerning easement negotiations, compensation, property ownership, and any future legal proceedings. Respectfully,

      Original en FERC · 20261009-5001 ↗

septiembre de 2026

  1. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits draft Resource Report No. 9 re the Desert Southwest Expansion Project under PF26-9.

  2. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits draft Resource Report Nos. 2, 3, and 8, re the Desert Southwest Expansion Project under PF26-9.

    Borrador del informe de uso de suelo: de ahí salen la distancia de 0.02 millas a Hueco Tanks y la lista de cruces de calles en el condado de El Paso.

  3. Ak-Chin Indian Community

    Ak-Chin Indian Community submits response re updates and public scoping sessions involving construction and operation of facilities for the Desert Southwest Expansion Project under PF26-9.

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    z, Chairman Ak-Chin Indian Community ORIGINAL Ak-CHIN INDIAN COMMUNITY Community Government 42507 W. Peters & Nall Road • Maricopa, Arizona 85138 • Telephone: [phone] • Fax: [phone] September 2, 2026 Debbie-Anne A. Reese Secretary, Federal Energy Regulatory Commission 888 First Street NE, Room 1A Washington, DC 20426 Re: PF26-9-000; Desert Southwest Expansion Project Dear Ms. Reese, The Ak-Chin Indian Community received your letter regarding updates and public scoping sessions for the Desert Southwest Expansion Project involving construction and operation of facilities by Transwestern Pipeline Company, LLC. After review, the Ak-Chin Indian Community has decided that we would like to start consultation for this project. Being that certain areas of the proposed location are significant to our community; we are asking to be kept updated. Should you have any questions please contact Tracy Wind, Acting Cultural Resource Manager at [phone] or Ms. Elaine F. Peters, Him-Dak Director at [phone]. Respectfully,

  4. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits draft Resource Reports 4, 6, and 7, and Appendix 1G of draft Resource Report 1 re the Desert Southwest Expansion Project under PF26-9.

    La empresa dice que espera presentar su solicitud de certificado a más tardar el 30 de nov. de 2026.

  5. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits draft Resource Report Nos. 5, 11, and 12 re the Desert Southwest Expansion Project under PF26-9.

  6. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Monthly Progress Report No. 5 for the period of 08/08/2026 to 09/11/2026 re the proposed Desert Southwest Expansion Project under PF26-9.

  7. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits draft Resource Report Nos. 1 and 10 re the Desert Southwest Expansion Project under PF26-9.

    Incluye el libro de mapas de la ruta del que sale el mapa 3D de este sitio.

agosto de 2026

  1. Office of Energy Projects

    Memo providing meeting notes of 08/12/2026 bi-weekly pre-filing meeting between FERC staff and Transwestern Pipeline Company, LLC re the Desert Southwest Expansion Project under PF26-9.

  2. Office of Energy Projects

    Memo providing meeting notes of the 08/04/2026 Interagency Meeting between FERC staff, Transwestern Pipeline Company, LLC et al. re the Desert Southwest Expansion Project under PF26-9.

  3. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits response to scoping period comments re the Desert Southwest Expansion Project under PF26-9.

  4. Federal Energy Regulatory Commission

    Transcript of the 08/03/2026 Public Scoping Meeting re the Desert Southwest Expansion Project under PF26-9.

  5. Office of Energy Projects

    Memo providing meeting notes of 07/29/2026 bi-weekly pre-filing meeting between FERC staff and Transwestern Pipeline Company, LLC re the Desert Southwest Expansion Project under PF26-9.

  6. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Monthly Progress Report No. 4 for the period of 07/10/2026 to 08/07/2026 re the proposed Desert Southwest Expansion Project under PF26-9.

  7. Earthworks

    Comments of Earthworks on behalf on the public re the proposed Desert Southwest Expansion Project under PF26-9.

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    EARTHWORKS Aug 5, 2026 Earthworks 1612 K St. NW, Suite 904 Washington, DC 20006 Debbie-Anne A. Reese, Secretary Federal Energy Regulatory Commission 888 First Street NE, Room 1A Washington, DC 20426 Re: Scoping Period Comments Collected by Earthworks for the Planned Desert Southwest Expansion Project, Transwestern Pipeline Company, LLC Docket No. PF26-9-000 Earthworks appreciate the opportunity to comment on the Planned Desert Southwest Expansion Project and respecNully submits the aOached comments for the pre-filing record in the above-referenced docket. We anScipate this project would realize significant harms for residents and eco-systems along its 516-mile route from West Texas through Arizona and therefore request that FERC prepare a full Environmental Impact Statement (EIS) for this project. The aOached comments were submiOed by members of the public through Earthworks’ public sign-on process. The views, statements, and characterizaSons in the aOached comments are those of the individual commenters alone and do not necessarily represent the views or posiSons of Earthworks. Thank you for your review and consideraSon. Sincerely, Allison Woolverton Policy Advocate & Campaign Manager Earthworks Enclosure – Comments from the public regarding Docket No. PF26-9-000

  8. Sierra Club

    Request to file Out of Time Comments of Sierra Club members and supporters re the Desert Southwest Expansion Project under PF26-9.

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    August 7, 2026 Federal Energy Regulatory Commission 888 First Street NE Washington, DC 20426 RE: Request for Filing Out of Time Comments in Docket PF26-9-000 To the Federal Energy Regulatory Commission, Please consider accepting our comments being filed on behalf of 1,845 Sierra Club members and supporters in Docket PF26-9-000 on the Desert Southwest Pipeline. We received the notices from FERC on needed changes to our initial timely submission after the comment deadline had closed, email correspondence attached below. We are making this request to re-file our amended comments. Thank you for your attention to this matter. Best, Jasmine Vazin Sierra Club

  9. Comentarios del público

    2 comentarios de personas del público

    1. REGULATORY SUPPLEMENT TO TRACT PROTEST: SUBMISSION OF ADDITIONAL ACREAGE PARCEL AND FRACTURED RESOURCE RIGHTS To the Federal Energy Regulatory Commission (FERC): My name is [name], writing on behalf of [name], the sole legal heir to the … Leer todo

      REGULATORY SUPPLEMENT TO TRACT PROTEST: SUBMISSION OF ADDITIONAL ACREAGE PARCEL AND FRACTURED RESOURCE RIGHTS To the Federal Energy Regulatory Commission (FERC): My name is [name], writing on behalf of [name], the sole legal heir to the Estate of [name]. I am writing to formally submit urgent supplemental record evidence regarding the properties identified in my recent hearing testimony. Forensic tracking of public land and tax records has revealed a third, previously concealed parcel with Property Code [number], located at [address] SW in Deming, New Mexico. The individual occupying [address] SW lacks clear, unclouded legal authority to grant any right-of-way, access easements, or field-survey permissions affecting this combined acreage. This cloud on title stems directly from an un-administered individual estate, active un-cleared encumbrances, and an unauthorized, non-compliant administrative land subdivision executed specifically to circumvent a lien. The applicant, Energy Transfer, is hereby put on notice that any negotiated or "blind" easement or survey signatures obtained from the occupant of [address] SW are legally void. Furthermore, the Commission is advised that the primary water assets attached to these tracts, specifically New Mexico Office of the State Engineer (NMOSE) file numbers M-03222 and M-04501,remain legally frozen in the individual name of the deceased owner of record, [name]. Because the underlying subsurface utility assets are fractured and subject to an immediate state title and ownership dispute, the applicant cannot safely execute a valid easement, routing design, or environmental construction layout across this zone. The Commission must maintain the current tract and pre-construction freeze on Property Codes [number], [number], and [number] until a court of competent jurisdiction determines the lawful direct bloodline lineage ownership of the parent parcel. Respectfully submitted,

      Original en FERC · 20260810-5007 ↗
    2. I am trying to figure out why they want to leave the I-10 path of all the other pipelines just to cross the sensitive riparian areas? Maybe you think that will gain you future access to those same areas? That may seem like long term … Leer todo

      I am trying to figure out why they want to leave the I-10 path of all the other pipelines just to cross the sensitive riparian areas? Maybe you think that will gain you future access to those same areas? That may seem like long term planning for the companies, but it is very short sighted for the wildlife dependent on those wild areas for survival. It is not like you can't get to where you need to go a less corruptive way. We in New Mexico hold our wild areas beyond precious and sacred, and resent every attempt to place corporate profits above the needs of our landscapes and wildlife. Such a suggestion is an insult to our repeated attempts to tell our reviewing agencies that we want lands protection about all other considerations. A few extra miles of pipeline does not have a cost anywhere close to the potential corruption of our lands, waters, and wildlife. Please hold this Transwestern Pipeline to the same standard of all the other transmission interests that already use the I-10 corridor. We already have disaster protocols along that route. It is just not necessary to create new protections for these vast areas of native lands, which if required to be used would create great damage. It is just better to keep these companies off our sensitive areas. Please deny their request. Thank you

      Original en FERC · 20260810-5001 ↗
  10. Federal Energy Regulatory Commission

    Transcripts of the 07/28/2026 et al. Public Scoping Meeting re the Desert Southwest Expansion Project under PF26-9.

  11. Comentarios del público

    Comentario de una persona del público

    1. UNITED STATES OF AMERICA BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION ​Transwestern Pipeline Company, LLC | Docket No. PF26-9-000 ​INDIVIDUAL CITIZEN AND PROPERTY OWNER SCOPING COMMENTS REGARDING THE DESERT SOUTHWEST EXPANSION … Leer todo

      UNITED STATES OF AMERICA BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION ​Transwestern Pipeline Company, LLC | Docket No. PF26-9-000 ​INDIVIDUAL CITIZEN AND PROPERTY OWNER SCOPING COMMENTS REGARDING THE DESERT SOUTHWEST EXPANSION PROJECT ​I. INTEREST OF THE COMMENTER My name is [name]. I am a resident, agricultural producer, and property owner in Dell City, Hudspeth County, Texas. Dell City is a small, isolated rural community reliant on deep groundwater aquifers and fragile high-desert ecosystems. ​I submit these formal scoping comments into Docket No. PF26-9-000 to request that the Federal Energy Regulatory Commission (FERC) thoroughly evaluate the localized environmental, infrastructural, and cumulative impacts of Transwestern Pipeline Company's proposed 526-mile, 48-inch natural gas transmission line on Dell City and Hudspeth County residents. ​II. SPECIFIC SCOPING ISSUES FOR THE NEPA ENVIRONMENTAL ASSESSMENT / EIS ​1. Cumulative Industrial Impacts on a Fragile Desert Valley: Hudspeth County is currently facing an unprecedented convergence of heavy infrastructure developments, including rare earth mining (USA Rare Earth / Round Top Mountain), additional natural gas lines, power transmission corridors, and border infrastructure projects. ​NEPA Requirement: FERC cannot evaluate Docket No. PF26-9-000 in isolation. The National Environmental Policy Act (NEPA) requires FERC to analyze the cumulative impact of this 48-inch pipeline in conjunction with surrounding mining, energy, and state infrastructure projects operating in the same geographic basin. ​2. Aquifer Protection and Industrial Water Drawdown: Hydrostatic testing and earthwork for a 48-inch pipeline require millions of gallons of water. In our high-desert environment, groundwater is our only lifeblood. Unregulated or rapid commercial extraction threatens surrounding private wells, agricultural operations, and municipal reserves. ​NEPA Requirement: FERC must require Transwestern/Energy Transfer to publish a detailed Water Sourcing and Discharge Plan. The Commission must evaluate potential drawdowns on local water tables, mandate strict monitoring of local agricultural and private wells, and prohibit unmonitored rural groundwater pumping during peak irrigation periods. ​3. Road Destruction, Airborne Dust, and Fugitive Particulate Matter: Heavy industrial hauling (pipe segments, heavy earthmoving machinery, and continuous heavy water tenders) over unpaved and narrow rural roads poses immediate threats to air quality and road integrity. ​NEPA Requirement: Dell City routinely faces harsh wind conditions. FERC’s environmental document must assess fugitive dust emission hazards (PM10 and PM2.5) caused by continuous heavy transport. FERC should require enforceable dust suppression protocols, dust control bonding, and mandatory road repair obligations along all designated haul routes. ​4. Public Safety, Emergency Services, and First Responder Strain: Rural Hudspeth County covers over 4,500 square miles serviced primarily by volunteer fire departments (Dell Valley VFD / ESD #2) and limited sheriff deputies. ​NEPA Requirement: FERC must evaluate the socioeconomic strain placed on local volunteer emergency services. The Applicant must be required to mitigate this risk by providing direct funding for pipeline-specific hazardous materials response gear, emergency training, and first-responder equipment stipends. ​III. CONCLUSION As a resident who lives and works on this land, I request that FERC require Transwestern Pipeline Company to address these localized impacts directly within the Environmental Assessment or Environmental Impact Statement. We ask that our water resources, air quality, rural safety, and community integrity be fully protected. ​Respectfully submitted, ​/s/ [name] [name] Resident and Property Owner Dell City, [address]

      Original en FERC · 20260807-5159 ↗
  12. Advocates for Snake Preservation

    Comments of Advocates for Snake Preservation and 1,062 supporters re routing concerns and ecological impacts of the Desert Southwest Expansion Project under PF26-9.

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    Advocates for Snake Preservation PO Box 2752, Silver City, New Mexico 88062 August 5, 2026 Re: Routing Concerns and Ecological Impacts of the Desert Southwest Expansion Project FERC Docket No. PF26-9-000 Advocates for Snake Preservation (ASP) submits these comments during the pre-filing review of Energy Transfer's proposed Desert Southwest Expansion Project ("Project"), an expansion of the Transwestern Pipeline system. ASP is a nonprofit that uses science, education, and advocacy to promote compassionate conservation and coexistence with snakes. While we are a national organization that works on issues across the US, we are headquartered in the Southwest and are familiar with the areas that would be impacted by the Desert Southwest Expansion Project. We write specifically to address the segment of the proposed route that departs the Interstate 10 corridor near Willcox, Arizona, and crosses the Muleshoe Ranch Preserve and Cooperative Management Area ("Muleshoe") and the Middle and Lower San Pedro River Valley. On behalf of 1,062 supporters of ASP, we respectfully request that FERC: ● Require a transparent, evidence-based analysis of alternative routes that avoid the Muleshoe Ranch Preserve and Cooperative Management Area and the Middle and Lower San Pedro River Valley; and ● Should any alignment through this landscape remain under consideration, ensure that the environmental review thoroughly analyzes the impacts identified below to water resources and wetlands, vegetation and wildlife, and threatened and endangered species. Potential Environmental Effects Water Resources and Wetlands Muleshoe: Hot Springs and Bass Canyon Watersheds Muleshoe encompasses the watershed of seven perennial streams and represents some of the best remaining aquatic habitat in southeastern Arizona. The Hot Springs watershed is federally designated as an Area of Critical Environmental Concern (ACEC), and both The Nature Conservancy and the Bureau of Land Management hold certificated instream flow rights in Hot Springs and Bass Canyons to sustain the perennial flows on which native fish and roughly 80% of the region's wildlife species depend at some point in their life cycle. The terrain here is steep and rocky, with shallow soils that produce a rapid runoff response. Ground disturbance in this setting translates quickly into accelerated erosion and sediment discharge during storm events, degrading the pools, riffles, and runs that native fish rely on. Soil compaction from heavy construction equipment can reduce water infiltration by more than 85%, further increasing runoff and erosion. Disturbance from the existing pipeline corridor here remains highly erosion-prone even after more than 40 years; the environmental review should presume that impacts here will be long-term and cumulative, not merely construction-period effects. Middle and Lower San Pedro River The Project reportedly would cross approximately 50 miles of the lower San Pedro River watershed, including a river crossing that Energy Transfer has indicated may be constructed as an under-river pipeline. The San Pedro is a groundwater-dependent, largely free-flowing river already under severe stress from more than 25 years of drought, recharge deficits, and groundwater over-pumping tied to agriculture and 45 years of regional mining. We ask FERC to require independent hydrological analysis of the proposed river-crossing method and its potential effects on baseflow and recharge, rather than relying on the applicant's own characterization. We are further concerned that a proposed lateral line would supply a water-intensive energy generation facility in the San Manuel area, sited within seven miles upstream of thousands of acres of environmentally sensitive mitigation and conservation land, including federally designated exchange property tied to the Resolution Copper mitigation obligations and lands managed by the Bureau of Land Management, Arizona Game and Fish Department, Bureau of Reclamation, and Salt River Project. Water demand from this facility could undermine the ecological purpose of those mitigation investments and could accelerate additional water-intensive industrial development, such as data centers, in a basin that does not have the water resources to support it. This cumulative water-demand analysis falls squarely within the scope of FERC's environmental review and should not be deferred to a separate, unrelated proceeding. Vegetation and Wildlife Muleshoe Muleshoe's rugged native grasslands and perennial riparian communities are rarely matched in the ecoregion and are part of the second-largest unfragmented landscape remaining in the Southwest, functioning as a critical wildlife connectivity corridor. Construction activity, including heavy equipment, trucks, and blasting, would introduce noise and lighting inconsistent with the Muleshoe Ecosystem Management Plan, disrupting animal communication and nesting birds. Project construction and maintenance would also increase wildfire risk and constrain the prescribed fire management that benefits native grasslands. As conservation biologists with a particular focus on reptile ecology, we are especially concerned about the risk that open construction trenches pose to small, ground-dwelling vertebrates such as the Sonoran Desert Tortoise and Gila Monster, both protected under Arizona state law. Without escape ramps and daily monitoring, open trenches readily entrap and kill wildlife that cannot climb out. Blasting and other damage to rock outcrops can permanently destroy microhabitat used as winter shelter by lizards and snakes and as nesting habitat for species such as the rock wren; these features, once destroyed, are not readily replaced. Middle and Lower San Pedro River Valley The San Pedro's riparian corridor is recognized as a Global Important Bird Area and supports more than 400 bird species, an estimated 80 mammal species, 14 fish species, and more than 40 species of reptiles and …

    Continúa en FERC ↗

  13. Arizona Dept. of Game & Fish

    Comments of the Arizona Game and Fish Department in response to FERC's Notice of Scoping Period Requesting Comments on Environmental Issues re the proposed Desert Southwest Expansion Project under PF26-9.

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    August 5, 2026 Ms. Carolyn Last Edge Environmental Inc. Electronically submitted to: [email] RE: Desert Southwest Expansion Project Scoping Dear Ms. Last: The Arizona Game and Fish Department (Department) appreciates the opportunity to review the Desert Southwest Expansion Project (Project). The Department understands that Transwestern Pipeline, LLC (TWP) is proposing to build a natural gas pipeline and associated lateral pipelines that will extend through Cochise, Pinal, Maricopa, and Mohave County. The Department met with Edge Environmental, EXP, and Westtech Environmental in January 2026 and provided a comment letter (#M26-01124811) for the Project in February 2026. In April 2026, the Federal Energy Regulatory Commission (FERC) approved TWP’s request to enter into FERC’s Pre-filing Environmental Review process. Since the Department’s original comment letter, portions of the Project route have been revised. There will be 165 miles of the Mainline and nine lateral lines (Apache, TEP Willcox, San Manuel, Saguaro, Germann, ED3, Desert Sun, Harquahala, and Mojave Energy Park) totaling approximately 155 miles routed within Arizona. The Department understands that the Project is now entering the scoping process to gather input from the public and interested parties on this updated route. Under Title 17 of the Arizona Revised Statutes, the Department, by and through the Arizona Game and Fish Commission, has jurisdictional authority and public trust responsibilities to conserve and protect the state fish and wildlife resources. In addition, the Department manages threatened and endangered species through authorities of Section 6 of the Endangered Species Act (ESA) and the Department’s Section 10(a)(1)(A) permit. It is the mission of the Department to conserve and protect Arizona's diverse fish and wildlife resources and manage for safe, compatible outdoor recreation opportunities for current and future generations. For your consideration, the Department provides the following comments based on the agency's statutory authorities, public trust responsibilities, and special expertise related to wildlife resources and recreation. The Department appreciates the early coordination on this project and understands that TWP will be conducting an environmental analysis under National Environmental Policy Act (NEPA), which will include an assessment of potential impacts to species listed under the ESA. The Desert Southwest Expansion Project August 5, 2026 Page 2 Department further appreciates that the proposed route will be co-located, to the extent practicable, with existing infrastructure. To assist TWP with the NEPA assessment, the Department provides the following list of species that are listed under the ESA and have been recorded within the vicinity of the Project. If you are uncertain about the effects of your project on these species and critical habitats, or if you anticipate your project will not be in compliance with the ESA, the Department recommends contacting the U.S. Fish and Wildlife Service1 (USFWS) for their Technical Assistance, as the USFWS will provide options to comply with the ESA, such as conservation measures to avoid or minimize any adverse effects to listed species. ● Yellow-billed Cuckoo and Southwestern Willow Flycatcher: The San Pedro River crossing along the Mainline route intersects with critical habitat for the endangered southwestern willow flycatcher and is adjacent to critical habitat for the threatened yellow-billed cuckoo. These species have been recorded within a mile of the river crossing. The Department appreciates that the Project is currently planned to be co-located with an existing pipeline at the river crossing and recommends that vegetation removal is minimized to the extent feasible in this area. Yellow-billed cuckoo has also been recorded within a mile of the Project along the riparian areas in the vicinity of Hot Springs Canyon. The Department recommends that construction activities near suitable habitat for these species avoid the breeding season (May through September). ● Loach Minnow, Gila Chub, Spikedace, Desert Pupfish, and Gila Topminnow: The Mainline route intersects with designated critical habitat for the endangered loach minnow, Gila chub, and spikedace within Hot Springs Canyon. In addition, the Department notes that the endangered desert pupfish and Gila topminnow have been documented within the riparian streams that intersect or run adjacent to the proposed route. Gila topminnow has also been recorded within less than two miles of the Mainline route within Edgar Canyon, just east of the San Pedro River crossing. Please note that the USFWS recently proposed a rule to delist Gila Chub as it is not a valid taxonomic entity2 and does not meet the definition of a species under the ESA. ● Yuma Ridgway’s Rail: Suitable habitat for the endangered Yuma Ridgway’s rail exists along the Gila River floodplain near the Desert Sun Lateral. This species has been recorded within less than a mile of the route. Bull Durham Wash (located west of the route) provides habitat for Yuma Ridgway’s rail and is fed primarily by agricultural runoff from the Paloma Irrigation and Drainage District (PIDD). To address the loss of this runoff due to project development, the Solana generating station, in coordination with the Department and the USFWS, agreed to release a minimum of 447 acre-feet of water per year into Bull Durham Wash. Should the Project result in additional loss of agricultural runoff, the Department would like to meet with TWP to discuss increasing the water allocation to Bull Durham Wash. ● Mexican Spotted Owl: The threatened Mexican spotted owl has been recorded within one mile of the Mainline route in the vicinity of the Winchester Mountains and Hot Springs Canyon. Critical habitat for this species is located approximately two miles north of the proposed route in the Winchester Mountains. The Department recommends working with Coronado National Forest, …

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  14. Water Protector Legal Collective

    Comments of Water Protector Legal Collective on FERC's Notice of Scoping Period Requesting Comments on Environmental Issues re the proposed Desert Southwest Expansion Project under PF26-9.

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    August 2, 2026 Via Online Portal Federal Energy Regulatory Commission Attn: Desert Southwest Expansion Project Docket No. PF26-9-000 Transwestern Pipeline Company, LLC 888 First Street NE Washington, DC 20426 Re: Public Comment on the Notice of Scoping Period Requesting Comments on Environmental Issues for the Planned Desert Southwest Expansion Project (Docket No. PF26-9-000) Dear Secretary Debbie-Anne A. Reese, The Water Protector Legal Collective ("WPLC") respectfully submits the following comments regarding the Federal Energy Regulatory Commission's ("Commission" or "FERC") environmental review of the proposed Desert Southwest Expansion Project ("Project"). WPLC is an Indigenous-led legal organization that works alongside Indigenous Peoples, Tribal Nations, Water Protectors, and frontline communities to defend Indigenous sovereignty, protect water, safeguard sacred places, and promote environmental justice through litigation, legal advocacy, public education, and administrative engagement. The proposed Desert Southwest Expansion Project presents issues that extend well beyond the construction of an interstate natural gas pipeline. Rather, the proposed project requires the Commission to determine whether the expansion of fossil fuel infrastructure across Texas, New Mexico, and Arizona may proceed consistent with the National Environmental Policy Act ("NEPA"), the National Historic Preservation Act ("NHPA"), the federal trust responsibility, and the Commission's obligation to ensure that any Certificate of Public Convenience and Necessity is supported by an extensive understanding of the project's environmental, cultural, and public interest consequences. Congress enacted NEPA to ensure that federal agencies evaluate environmental consequences before making irreversible 1 commitments of resources, consequently informing agency decision making rather than rationalizing decisions already made.1 These comments focus primarily on the scope of the Commission's environmental review. The current scoping process presents the Commission with an important opportunity to identify the environmental, cultural, and legal issues that must be fully evaluated before any determination regarding the proposed project. As the Commission explains in the Federal Register notice initiating this proceeding, the purpose of scoping is to identify the major environmental issues, reasonable alternatives, and measures that may avoid or lessen environmental impacts before preparation of the environmental document. The proposed pipeline corridor traverses lands and waters that continue to bear profound cultural, historical, spiritual, and environmental importance for numerous Tribal Nations. Federal approval of new fossil fuel infrastructure within these landscapes therefore implicates the federal government's trust responsibility, its obligations to perform meaningful government-to-government consultation, and its duty to protect historic properties, traditional cultural properties, sacred places, and other resources possessing continuing religious and cultural importance to Indigenous communities.2 Accordingly, WPLC respectfully urges the Commission to ensure that the environmental review fully evaluates the Project's direct, indirect, and cumulative impacts; conducts meaningful government-to-government consultation throughout the review process; incorporates Indigenous Knowledge and Tribal expertise; analyzes a reasonable range of alternatives, including the No Action Alternative; and fully considers impacts to water resources, Indigenous cultural landscapes, sacred sites, climate, environmental justice, and future generations before determining whether the proposed project is consistent with the public convenience and necessity. Background According to the Commission's Notice of Scoping Period Requesting Comments on Environmental Issues, Transwestern Pipeline Company, LLC proposes to expand its existing interstate natural gas transmission system through construction and operation of a substantial network of new 2 National Historic Preservation Act, 54 U.S.C. §§ 300101-307108; 36 C.F.R. pt. 800 (2025); Exec. Order No. 13,175, 65 Fed. Reg. 67,249 (Nov. 9, 2000); Exec. Order No. 13,007, 61 Fed. Reg. 26,771 (May 24, 1996); Seminole Nation v. United States, 316 U.S. 286, 296-97 (1942); United States v. Mitchell, 463 U.S. 206, 225 (1983). 1 National Environmental Policy Act, 42 U.S.C. §§ 4321-4336h; Robertson v. Methow Valley Citizens Council, 490 U.S. 332, 349-50 (1989); Marsh v. Or. Nat. Res. Council, 490 U.S. 360, 371-74 (1989); Calvert Cliffs' Coordinating Comm., Inc. v. U.S. Atomic Energy Comm'n, 449 F.2d 1109, 1112–15 (D.C. Cir. 1971). 2 pipeline facilities across Texas, New Mexico, and Arizona. The proposed project would include approximately 526.5 miles of new 48-inch-diameter mainline pipeline, approximately 181.5 miles of new lateral pipelines, eight new compressor stations, modifications to two existing compressor stations, twenty-six new meter stations, and associated valves and aboveground facilities. According to Transwestern, the Project is intended to provide transportation capacity of up to 2.3 billion cubic feet of natural gas per day from the Permian Basin to customers in New Mexico and Arizona while modifying portions of the existing pipeline system to permit bi-directional flow. The Commission initiated the pre-filing environmental review process pursuant to Docket No. PF26-9-000 and announced the commencement of public scoping through publication of its July 9, 2026 Federal Register notice. The Commission explains that the purpose of scoping is to gather public input regarding the environmental issues that should be addressed during preparation of the environmental document and to identify reasonable alternatives and mitigation measures before the Commission considers a future application for a Certificate of Public Convenience and Necessity. The Commission has emphasized that no approval has …

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  15. Comentarios del público

    2 comentarios de personas del público

    1. Hello, I oppose this project. Its route is through the driest state in the United States. This project will strain the water supplies already stretched thin. The additional stress the from the increased fracking in Texas to cooling data … Leer todo

      Hello, I oppose this project. Its route is through the driest state in the United States. This project will strain the water supplies already stretched thin. The additional stress the from the increased fracking in Texas to cooling data centers in Arizona. The gas this pipeline carries is intended to power the region's growing Al data centers. While utility costs have risen a lot in the past 18 months, ratepayers and not data center companies, are the ones covering the buildout. Furthermore, this project threatens habitat for countless animals, some threatened, including the Gila chub, loach minnow, spikedace, yellow-billed cuckoo, and Mexican spotted owl. Not to mention the communities and tribes the route will threaten. This is land that is sacred to their people. Thank you for your time

      Original en FERC · 20260806-5003 ↗
    2. I am a power systems engineer specializing in the economics of carbon-free energy systems. FERC/NEPA requires that applicants demonstrate that viable alternatives were evaluated and do not impose less impact on the people of this country. … Leer todo

      I am a power systems engineer specializing in the economics of carbon-free energy systems. FERC/NEPA requires that applicants demonstrate that viable alternatives were evaluated and do not impose less impact on the people of this country. Yet, to the best of my knowledge, the applicant has not evaluated the alternative of generating the needed energy with solar PV systems and using readily available grid-scale battery storage systems to deliver that power 24 hours a day, seven days a week. Such an evaluation should consider purchasing electricity imported over transmission lines to fill in for the few days a year in Arizona (the primary expected energy consuming state) when solar energy is lacking. As a power systems engineer I can assure you that solar energy, turned into a 24/7 energy source using batteries for evening hours and backed up by electricity imported through transmission lines a few hours a year, is less expensive and less dangerous and polluting than a 500+ mile pipeline transmitting (and leaking) natural gas. I can provide reputable studies demonstrating the superior economics of solar PV generation paired with battery energy storage to meet large "base load" demand. Residents along the pipeline route would lose some use of the land over the pipeline, be exposed to possible leaks and fires, and have to put up with digs to service "anomalies" for many decades. CO2 emitted by the burning of the gas will aggravate the fires, floods, droughts, dust storms, and hurricanes we are increasingly suffering from as the climate crisis continues to deepen its disruption of earth climate systems. Engineers generally expect 1-2 percent of the methane in the pipeline to leak and this contributes even more to climate problems than burned methane. Solar power, on the other hand, has no climate or hazardous pollutant emissions. Since solar power is affordable for covering a large percentage of the growing energy need it must be evaluated as a viable alternative. If some small amount of gas is needed to cover the rare extended cloudy times, exiting gas pipelines have sufficient capacity to cover that. I urge FERC to consider the viability of alternatives like I have descibed that don't infringe on the rights of rural landowners and minimize the pollution impacts of delivering energy to meet the growing demands in Arizona.

      Original en FERC · 20260806-5000 ↗
  16. Federal Energy Regulatory Commission

    Transcript of the 07/21/2026 et al. Public Scoping Meetings re the Desert Southwest Expansion Project under PF26-9.

  17. Comentarios del público

    Comentario de una persona del público

    1. Presentado en papel o escaneado; ábralo en FERC.

      Original en FERC · 20260805-5233 ↗
  18. Luna Hermosa, LLC

    Comments of Luna Hermosa, LLC in response to FERC's Notice of Scoping Period Requesting Comments on Environmental Issues re the proposed Desert Southwest Expansion Project under PF26-9.

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    July 27, 2026 Docket No.: PF26-9-000 These comments are submitted in response to an invitation to comment from the Federal Energy Regulatory Commission received by Luna Hermosa, LLC regarding scoping sessions related to an application in process by Energy Transfer’s Transwestern Pipeline Company, LLC for its Desert Southwest Pipeline Expansion Project. Luna Hermosa, LLC is the owner of a parcel of land located in Deming, New Mexico. Transwestern has been in contact with Luna Hermosa, LLC regarding Transwestern’s interest in acquiring an easement across this parcel for the planned pipeline route. Luna Hermosa’s parcel is located within the city limits of Deming, New Mexico. The parcel is located within an established residential area, bounded by Dona Ana Road to the north, with residences to its west and north, and with a long-established residential subdivision named Country Club Estates directly across the street to the east. We believe Luna Hermosa’s parcel to be zoned by the City of Deming for residential use. We estimate that residences near the proposed pipeline route are home to between 200 and 300 people. This number will likely increase over the next 15 to 20 years. The Commission’s invitation to comment has suggested topics which may be of concern to affected parties. The comments which follow relate primarily to reliability and safety. Reliability and safety of the proposed route The capacity of the pipeline which is planned for the Desert Southwest Expansion project is substantially higher than the capacities of existing gas pipelines in New Mexico and adjacent states. While 30 inch diameter seems to be fairly consistent for most of the pipelines already operating in the region, the expansion project is planning 48 inch diameter pipes as of this writing. Relative to smaller diameter pipes, this would represent a 45% increase in gas transmission capacity, with a proportionally higher potential for safety issues along the proposed route. We have been advised by Doyle Land Services, Energy Transfer’s authorized agent that after construction of the Desert Southwest Pipeline Expansion, a 50 foot safety margin will be maintained above the pipeline along the route and that no digging or heavy equipment work can be done within this margin. We have considerable concerns about the planned 50 foot margin after learning of a 2021 gas pipeline accident in Coolidge Arizona, where two people were killed by an explosion at a nearby pipeline. The National Transportation Safety Board’s report of the incident indicated that the victims were at their residence at the time of the explosion. Their home was located 150 yards away from the breached pipeline, well beyond the 50 foot margin cited by Energy Transfer for the project under consideration by the Commission. We acknowledge that due to the physical properties natural gas, it is extremely difficult to establish an absolute safe zone for pressurized gas. It well understood that if gas is released under pressure, it will migrate until it disperses to a concentration of gas which is no longer flammable, or until it encounters an ignition source and causes an explosion. We believe that the proposed route for this project places the pipeline to near too many homes and as a consequence, too many ignition sources. In this context, a pilot light for a home appliance such as a gas stove, furnace, clothes dryer or an outdoor cooking grill could serve as an ignition source for released gas. Relevant Alternative We note that two natural gas pipelines are located approximately 1/2 mile south of the proposed Desert Southwest Pipeline Expansion route at the south boundary of Deming. We would like to propose to the Commission that the final route of the Expansion Project be moved to the south, nearer to the existing pipelines and safely away from both existing and future residences. This alternative would: - leverage the benefits of colocating the project within an already permitted corridor, - better isolate any associated safety hazards, and - significantly decrease any hazards presented to the residents of this area by the proposed route. We thank the Commissioners for their expertise and experience and for their work to protect the public while ensuring adequate public access to energy resources. We would also like to thank the Commission staff for their hard work and thoughtful consideration of these comments. With kind regards, James T. Firkins, Managing Member Leslie S. Firkins, Principal Member Luna Hermosa, LLC Albuquerque, New Mexico

  19. U.S. Forest Service, Coronado National Forest

    Comments of the U.S. Forest Service, Coronado National Forest to enhance project planning and compliance with environmental review and disclosure under the National Environmental Policy Act re the proposed Desert Southwest Expansion Project under PF26-9.

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    United States Department of Agriculture Forest Service Coronado National Forest Supervisor's Office 300 W. Congress Street Tucson, AZ 85701 [phone] Caring for the Land and Serving People Printed on Recycled Paper File Code: 2720; 1900 Date: August 3, 2026 Debbie-Anne A. Reese Secretary Federal Energy Regulatory Commission 888 First Street NE, Room 1A Washington, DC 20426 Dear Ms. Reese: Thank you for the invitation to comment on the proposed Desert Southwest Expansion Project (Docket No. PF26-9-000) involving the construction and operation of natural gas facilities by Transwestern Pipeline Company, LLC (Transwestern). The Coronado National Forest (CNF) hereby requests to become a cooperating agency with the Federal Energy Regulatory Commission (FERC) for the Desert Southwest Expansion Project. As currently understood, the project proposes 0.9 mile of pipeline on the Coronado National Forest in the Winchester Ecosystem Management Area on the Safford Ranger District. Pursuant to 7 CFR 1b.9(m)(3), the CNF requests cooperating agency status because the USDA Forest Service has jurisdiction by law and special expertise with respect to environmental impacts for the portion of the proposal that occurs on National Forest System (NFS) lands. It is our intent to provide these comments and information to enhance project planning and compliance with environmental review and disclosure under the National Environmental Policy Act (NEPA). Based on inconsistencies with management direction found in the 2018 Coronado National Forest Land and Resource Management Plan (Forest Plan), the CNF requests that Transwestern consider an alternative that does not propose to use and occupy NFS lands managed by the Coronado National Forest. If the selected alternative must occur on NFS lands, we favor a proposal that most closely conforms to the Forest Plan direction of minimizing impacts to resources on the national forest including, but not limited to, wildlife, scenery, special uses, and cultural resources. The CNF requests that FERC review the Forest Plan for consistency with applicable management direction including desired conditions, objectives, standards, and guidelines for the proposed project area. On the Coronado National Forest, the project falls within the Roaded Backcountry Land Use Zone within the Winchester Ecosystem Management Area. A preliminary review of the proposal has identified the following regulatory and resource concerns related to proposed activities that may occur on land managed by the USDA Forest Service, Coronado National Forest: Debbie-Anne A. Reese 2 Environmental Issues and Resource Concerns Wildlife: - In accordance with Forest Service Manual 2670, impacts to Regional Forester Sensitive Species (RFSS) must be analyzed and disclosed in the Environmental Impact Statement (EIS). The CNF can provide a list of RFSS that occur within the project area. Tribal Consultation: - As the lead agency, FERC should ensure that tribal consultation processes and requirements are met. The CNF can provide contacts for the 12 affiliated tribes. Range: - The Affected Environment in the EIS should disclose that the proposed pipeline location passes through an active grazing allotment (Rocky Allotment). Impacts to range resources should be analyzed and disclosed as appropriate in the EIS. Special Uses: - El Paso Natural Gas/Kinder Morgan pipeline is located in the proposed project vicinity. Transwestern needs to ensure adequate notification and coordination occur to deconflict. 36 CFR Part 218 - Project-Level Pre-decisional Administrative Review Process The decision to be made regarding activities that occur on NFS land is subject to the predecisional administrative review process pursuant to 36 CFR 218 Subparts A and B. If it is determined that a forest plan amendment is needed to include site-specific exceptions to plan direction to accommodate the proposed action, the decision associated with the plan amendment would also be subject to the pre-decisional administrative review process pursuant to 36 CFR 218 Subparts A and B. These two processes may run concurrently. National Forest Management Act (NFMA) The Coronado National Forest Land and Resource Management Plan (Forest Plan) establishes multiple goals and objectives intended to balance multiple uses of Forest resources. As required by the National Forest Management Act (NFMA), the portion of the proposed action that occurs on NFS land must be examined for consistency with applicable Forest Plan desired conditions, objectives, standards, and/or guidelines for specific management and geographic areas (36 CFR §219.15(d)). The project must be consistent with the Forest Plan and suitable for the management area. If the project is found to be inconsistent with any applicable plan components, a project-specific amendment to the Forest Plan would be required. Based on a preliminary review of the proposed action, it is anticipated that the project may be inconsistent with multiple plan components including, but not limited to: - Special Uses – Standard: Major utility corridor development is confined to the area identified and mapped in the 2008 “West-wide Energy Corridor Programmatic EIS”. Debbie-Anne A. Reese 3 Standards are constraints upon project and activity decision-making. A standard is an absolute requirement to be met in the design of applicable projects and activities. A project or activity is consistent with a standard when its design is in accordance with the explicit provisions of the standard; variance from a standard is not allowed except by plan amendment (36 CFR 219.15(d)(2)). The decision associated with a project-specific plan amendment would also be subject to the pre-decisional administrative review process pursuant to 36 CFR 218 Subparts A and B. Additional plan components applicable to the proposed project include, but are not limited to: Roaded Backcountry Land Use Zone - Guideline: New utility structures and power lines should be …

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  20. Comentarios del público

    3 comentarios de personas del público

    1. I own property in Oracle, Arizona and am opposed to the Desert Southwest Expansion Project as a whole. Digging and constructing 520 miles of pipeline will tear up the land, killing plants, animals, and ruining habitat. It will also tax our … Leer todo

      I own property in Oracle, Arizona and am opposed to the Desert Southwest Expansion Project as a whole. Digging and constructing 520 miles of pipeline will tear up the land, killing plants, animals, and ruining habitat. It will also tax our limited resources in these rural desert areas, namely water and dwindling natural vegetation. We don't want this construction upheaval or it's residual dangers in our area. Gas pipelines leak and there are explosions and construction accidents every year. I don't want these toxic dangers anywhere near my community in Oracle. A compressor station in or near the town will also be a blight and extra source of environmental risk. Oracle is a nature-loving community and we don't want a business venture tearing through our land. Construction will disturb and destroy habitat all along the pipeline's length, and then we are left with a scar on the land, toxic materials in the earth, and an infrastructure that will need repair and replacement at some point. It is likely there will be a toxic leak at some point on this huge project. I don't want that to happen in any of our beautiful and sacred desert southwest. I am opposed to this project and I will work with my community to keep it from being approved.

      Original en FERC · 20260805-5175 ↗
    2. I would like to express my dislike and concern regarding the Desert Southwest Expansion Project plan, in particular the routing through the town of Oracle Arizona, and in general I am opposed to the project completely… but to speak to … Leer todo

      I would like to express my dislike and concern regarding the Desert Southwest Expansion Project plan, in particular the routing through the town of Oracle Arizona, and in general I am opposed to the project completely… but to speak to Oracle in particular: this is a place I spend much time, working on my partner’s land, making art and exploring nature. This town is a stop along the Arizona Trail, and a place where people from all over visit to enjoy the unique and beautiful environment. Placing a compressor station and pipes through this area runs in the face of a town, and people, that celebrate nature. I would hope the people making these decisions would visit Oracle, meet some of the community there, walk around the trails, look at the nature, and then I know they would see the folly of interfering with the special beauty of this place. Please see for yourself before making a mistake. And, to be clear, I am opposed to the entire plan. [name] [name]

      Original en FERC · 20260805-5169 ↗
    3. Comments of [company] Regarding the Proposed Energy Transfer Pipeline Submitted to the Federal Energy Regulatory Commission (FERC) Docket No. PF26-9-000 August 5, 2026 Re: Energy Transfer Pipeline Project – Docket No. PF26-9-000 To the … Leer todo

      Comments of [company] Regarding the Proposed Energy Transfer Pipeline Submitted to the Federal Energy Regulatory Commission (FERC) Docket No. PF26-9-000 August 5, 2026 Re: Energy Transfer Pipeline Project – Docket No. PF26-9-000 To the Commissioners: My name is [name], and I am a Managing Member of [company], owner and operator of the historic [place] located in the San Pedro River Valley of southeastern Arizona. Our family purchased the [place] in February 2004 and has continuously operated it as a working cattle ranch. Historical records indicate that ranching operations on this property date back to 1879 or earlier, making it one of the longest continually operated ranches in the region. We are committed to preserving this historic ranch and responsibly managing its natural resources for future generations. [company] has not granted Energy Transfer permission to construct a pipeline across our property, and we respectfully object to the proposed route as currently identified. We urge the Commission to carefully evaluate alternatives that avoid this historic working ranch and minimize impacts to agricultural operations and the unique resources of the San Pedro River Valley. The proposed Energy Transfer pipeline would directly affect our ranching operation and the natural resources upon which it depends. While much of the proposed route across our ranch would be located on lands we lease from the Arizona State Land Department (ASLD) for grazing, those leased lands are an essential part of our overall ranching enterprise. Our deeded property and state grazing lease operate together as one integrated livestock operation. Any disruption to the leased lands directly impacts the management, productivity, and economic viability of the ranch. I respectfully request that FERC carefully consider the following concerns during its review of this project: 1. Impacts to an [place] [place] is an active cattle ranch with livestock, fencing, water developments, ranch roads, corrals, and other improvements necessary to support day-to-day operations. Construction and future maintenance of the pipeline would interfere with livestock management, grazing rotations, ranch access, fence maintenance, and other routine agricultural activities. 2. Arizona State Grazing Lease The proposed route primarily crosses lands covered by our Arizona State Land Department grazing lease. These lands are not vacant or unused; they are actively managed as part of our ranching operation. Pipeline construction, permanent easements, maintenance access, and future restrictions would reduce our flexibility to manage livestock and maintain the ranch as a single, efficient operation. 3. Long-Term Property Impacts The pipeline would create permanent easements across lands that have been used for ranching for well over a century. These easements would limit future management options, reduce operational flexibility and potentially diminish the value of both our deeded property and our grazing operation. 4. Environmental Resources The San Pedro River Valley contains valuable riparian habitat, wildlife resources, native vegetation and sensitive natural areas. Construction activities have the potential to increase erosion, introduce invasive plant species, disturb wildlife habitat, alter drainage patterns and negatively affect the ecological integrity of this unique landscape. 5. Ranch Security and Public Safety Pipeline corridors often require long-term maintenance access. Increased vehicle traffic and access routes can contribute to trespassing, illegal dumping, vandalism and unauthorized recreational use. These are already ongoing concerns for our ranch and could be made worse by the proposed project. 6. Cumulative Impacts The San Pedro Valley is already experiencing increasing pressure from multiple proposed infrastructure and energy-related projects. These include additional pipeline proposals and mineral exploration activities. FERC should carefully evaluate the cumulative impacts of this and other projects on agricultural operations, natural resources, wildlife habitat, and the long-term viability of historic ranches throughout the valley. For these reasons, I respectfully request that FERC: Fully evaluate alternatives that avoid active ranching operations and environmentally sensitive areas within the San Pedro River Valley. Require Energy Transfer to avoid or minimize impacts on working agricultural lands. Conduct a thorough analysis of impacts on livestock operations, grazing management, water resources, wildlife habitat, and private property rights. Fully evaluate the cumulative impacts of this project together with other proposed utility and energy development projects affecting the San Pedro Valley. Ensure that any unavoidable impacts are fully mitigated and that affected landowners and grazing lessees are adequately protected. [place] has been an operating ranch since at least 1879 and has remained an important part of Arizona’s agricultural heritage. Our family has proudly continued that stewardship since purchasing the ranch in February 2004. I respectfully ask the Commission to consider the long-term impacts this project could have on our ranch, our grazing operation, and the unique natural resources of the San Pedro River Valley. Thank you for your consideration of these comments. Respectfully submitted,

      Original en FERC · 20260805-5165 ↗
  21. Arizona Public Service Company

    Comments of Arizona Public Service Company in response to FERC's Notice of Scoping Period Requesting Comments on Environmental Issues re the proposed Desert Southwest Expansion Project under PF26-9.

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    August 5, 2026 Ms. Debbie-Anne Reese, Secretary Federal Energy Regulatory Commission 888 First Street, N.E. Room 1A Washington, D.C. 20426 Re: Docket No. PF26–9–000 Transwestern Pipeline Company, LLC Proposed Desert Southwest Expansion Project – Comments of Arizona Public Service Company in Response to Notice of Scoping Period Dear Ms. Reese: Arizona Public Service Company (“APS”) respectfully submits these comments in response to the Federal Energy Regulatory Commission’s (“FERC”) Notice of Scoping Period Requesting Comments on Environmental Issues for the Planned Desert Southwest Expansion Project (“Project”).1 FERC has invited comments on a range of environmental topics, including reasonable alternatives under the National Environmental Policy Act. APS’s comments that follow: (1) provide case law support for why NEPA does not require FERC to consider alternatives that rely on other energy sources; and (2) provide factual background demonstrating there are not reasonable alternatives to the Project that would meet the energy needs in Arizona on the timeframe and scale needed. APS requests that the Commission scope its alternatives analysis to those alternatives that satisfy the Project’s stated purpose of transporting natural gas from the Permian Basin to delivery points in New Mexico and Arizona, and decline to analyze non-gas energy generation alternatives that are outside FERC’s jurisdiction and inconsistent with the Project’s purpose. I. Background. APS, a wholly owned subsidiary of Pinnacle West Capital Corporation, is a vertically integrated public utility doing business under the laws of the State of Arizona and is engaged in generating, transmitting, and distributing electricity in eleven of Arizona’s fifteen counties. APS serves 1 91 Fed. Reg. 42,431 (Jul. 9, 2026). Brian W. Cole Vice President Resource Management 400 North 5th Street, M.S. 9085 Phoenix, Arizona 85004 P.O. Box 53933 Phoenix, Arizona 85072 Tel [phone] Honorable Debbie-Anne Reese Federal Energy Regulatory Commission August 5, 2026 Page 2 of 7 more than 1.4 million retail electric customers and is a participant in the CAISO Western Energy Imbalance Market. APS is registered with the North American Electric Reliability Corporation (“NERC”) for purposes of compliance with the Electric Reliability Standards and performs ten of the registered NERC functions.2 APS is the largest and longest-serving electric company in Arizona, having served the state since 1886. Our service territory encompasses nearly 35,000 square miles in one of the most geographically diverse regions in the country. APS employs over 6,000 technically skilled personnel and APS’s operations result in an estimated annual $11.3 billion economic benefit to the State of Arizona. APS’s service territory is experiencing an extraordinary period of population and economic growth. APS employs careful planning to prepare for and respond to this growth in a way that ensures reliable service for existing and future customers. APS has specialized experience in evaluating and planning for projected energy demand in Arizona. Every three years, APS performs a comprehensive study to develop an integrated resource plan that matches projected customer growth with the resources needed to meet customer demand. The study considers factors including expected economic growth, new and developing technologies, and potential weather-based impacts, and it includes stakeholder outreach through the Resource Planning Advisory Council, which includes local consumer advocates, university researchers, resource developers, and environmental and public interest organizations. The results of APS’s study are filed with the Arizona Corporation Commission as APS’s Integrated Resource Plan. As explained below, APS’s current planning process has identified additional natural gas resources as part of the most economic portfolio across a broad array of scenarios. Existing interstate pipelines serving Arizona, however, are currently fully subscribed for firm capacity. There is sufficient natural gas supply available from the Permian Basin, but additional pipelines are needed to transport that supply to Arizona’s power plants to maintain reliability in all seasons. Much of this information is summarized in excerpts from a September 2025 APS presentation to its Resource Planning Advisory Council, attached as Exhibit A and incorporated herein. APS reviewed multiple proposals to expand gas delivery and identified the Project as the means of providing customers with the best combination of reliability and affordability. APS is a direct and material participant in the Project, having executed a binding agreement with Transwestern for firm transportation service on the expanded system. As such, APS has a substantial and immediate interest in the timely approval and construction of the Project, which is essential to APS’s ability to fulfill its statutory obligation to provide safe, reliable, and affordable electric service to its customers. 2 APS is registered with NERC as a Balancing Authority, Transmission Operator, Transmission Owner, Transmission Planner, Transmission System Provider, Planning Authority, Generation Operator, Generation Owner, Resource Planner, and Distribution Provider. Honorable Debbie-Anne Reese Federal Energy Regulatory Commission August 5, 2026 Page 3 of 7 II. NEPA Does Not Require FERC to Consider Alternatives Based on Other Energy Sources. As a matter of law, NEPA does not obligate FERC to evaluate different energy sources or nongas alternatives in FERC’s environmental review in the context of a natural gas pipeline certification proceeding. Under NEPA, an agency must identify the purpose and need of the proposed action before considering alternatives.3 The D.C. Circuit has confirmed that when considering a private proposal, FERC may accord substantial weight to the preferences of the applicant and sponsor.4 Here, the purpose of the Project is to provide up to 2.3 billion …

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  22. National Park Service IMR

    Comments of the U.S. National Park Service, Guadalupe Mountains National Park re the proposed Desert Southwest Expansion Project under PF26-9.

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    United States Department of the Interior NATIONAL PARK SERVICE GUADALUPE MOUNTAINS NATIONAL PARK 400 Pine Canyon Drive Salt Flat, Texas 79847 [phone] VIA ELECTRONIC MAIL AND HARD COPY TO FOLLOW Debbie-Anne A. Reese Secretary Federal Energy Regulatory Commission 888 First Street NE Washington, DC 20426 Re: Desert Southwest Expansion Project, Docket No. PF26-9-000 Dear Secretary Reese: The National Park Service (NPS) appreciates the opportunity to review and provide information during the Federal Energy Regulatory Commission’s (FERC) public scoping period for Transwestern Pipeline Company, LLC’s proposed Desert Southwest Expansion Project (Project), Docket No. PF26-9-000. Based on the preliminary project map in Appendix 2 of the scoping notice, the facility description for the proposed Project, and review of available GIS data, it appears that a few NPSadministered units and resources are within the broader area of influence of the proposed Project. The closest identified NPS unit appears to be Guadalupe Mountains National Park in the Pine Springs/US 62/180 corridor, where the proposed mainline appears to cross NPS-administered lands. The NPS understands that existing easements or rights-of-way may be present in the Pine Springs/US 62/180 corridor and may predate the park’s establishment or NPS acquisition of those lands. The NPS is reviewing available land status and realty information for this area and can provide relevant NPS boundary, tract, or resource information, as appropriate, to support FERC’s environmental review. The NPS notes that its authority to authorize rights-of-way across NPS-administered lands is limited by statute, and any new or expanded pipeline use of NPSadministered lands would need to be supported by a valid existing right or other specific legal authority. The NPS has also identified potential implications for NPS-administered National Historic Trails, including the Butterfield Overland National Historic Trail and El Camino Real de Tierra Adentro National Historic Trail. The NPS requests any updated or revised GIS data as project details are refined, including changes to the proposed route, facility locations, or other project components that may be relevant to NPS review. This information would allow the NPS to better identify the proximity of the project area and its components to NPS units, trails, and other resources of concern. If you have any questions or would like additional information regarding NPS resources, please contact Tom Schaff, Superintendent, Guadalupe Mountains National Park, at [email]. For questions regarding NPS-administered National Historic Trails, please contact Jill Jensen, Lead Planner, National Trails Intermountain Region, at [email]. Sincerely, Tom Schaff Superintendent Guadalupe Mountains National Park cc: Patrick Malone, Superintendent, National Trails Intermountain Region Jill Jensen, Lead Planner, National Trails Intermountain Region Nida Holliday, Energy & Minerals Program Coordinator, DOI Interior Regions 6, 7, & 8

  23. Comentarios del público

    Comentario de una persona del público

    1. August 5 2026 Laura V. Swett, Chair Federal Energy Regulatory Commission [address] NE, Washington, DC 20426 Re: Scoping Comments on Desert Southwest Expansion Project (Docket #PF26-9- 000), Submitted via FERC eRegisterTo the Federal Energy … Leer todo

      August 5 2026 Laura V. Swett, Chair Federal Energy Regulatory Commission [address] NE, Washington, DC 20426 Re: Scoping Comments on Desert Southwest Expansion Project (Docket #PF26-9- 000), Submitted via FERC eRegisterTo the Federal Energy Regulatory Commission This is to comment on Energy Transfer's Desert Southwest/Transwestern Pipeline Expansion Project, to be referred to as the Project: As a landowner in Cascabel, Arizona, living in the San Pedro River Valley, I have severe resistance to the expansion of a natural gas pipeline across the most biodiverse desert in the United States. The portion of the proposed route of the Project through northeastern Arizona would travel west roughly from the [place] Cooperative Management Area under the auspices of The Nature Conservancy (TNC), to the city of Phoenix. While there are extensive biotic and Tribal cultural rationales against the Project, my comments focus on overall ecological illogic and natural hazard risks: Most significantly, the Project is based on the false premise that natural gas is needed to meet electrical power demands in the Southwest. The burning of fossil fuel is dirty energy, regressive and counterproductive. This is especially true in the Southwest where non-polluting solar energy is readily available. Natural gas combustion increases the extreme atmospheric heat, reduced air quality, and weather pattern instabilities to which its use for electricity is a purported response. The Project's estimated pipeline flow of natural gas per day would generate greenhouse gas emissions equal to 15 coal-fired power plants. Explosive and/or flammable methane leaks along the proposed pipeline corridor, not uncommon with Energy Transfer pipelines, would not only risk increased fire in a remote region experiencing long-term drought, but would substantially affect already strained water resources. According to TNC, “[place] CMA encompasses most of the watershed area for seven permanently flowing streams, representing some of the best remaining aquatic habitat in southeast Arizona.” Horizontal Directional Drilling proposed to cross under the San Pedro River would insert drilling muds through unstable sandy soils, risking pollution and destruction of underground water sources that local communities rely on for drinking, ranching, and farming. The poor environmental record of Energy Transfer must be considered. The company has been charged multiple millions of dollars in federal and state fines in past years for adverse environmental impacts. Federal pipeline safety data show hundreds of gas leaks in Energy Transfer operations over the past 20 years resulting in waterway contamination.The company itself has reported nearly 800 separate pipeline incidents since 2010 involving spills, leaks, or pollution violations. Reuters reported as recently as February 2, 2021: The Pennsylvania attorney general's office on Wednesday charged a unit of Energy Transfer LP with nine counts of environmental crimes related to construction of the Revolution natural gas pipe in the western part of the state. A portion of the 24-inch (61-centimeter) pipe failed in an explosion after heavy rains caused a landslide in Center Township in Beaver County on Sept. 10, 2018. The resulting fire destroyed a nearby home, damaged power lines and burned several acres of surrounding woodland." https://www.reuters.com/business/environment/pennsylvania-ag-charges- energy-transfer-with-environmental-crimes-2022-02-02/#:~:text=Feb %202%20(Reuters,of%20surrounding%20woodland.  Myriad sources of potential destruction exist in the Desert Southwest Expansion Project designed by Energy Transfer. There are wiser and safer energy alternatives to be investigated in order to safeguard a beautiful remote and fragile desert area. Installation of a natural gas pipeline runs counter to the preservation of the water quality and the rare biodiversity of the San Pedro River. Thank you,

      Original en FERC · 20260805-5155 ↗
  24. Sierra Club; Western Environmental Law Center; Center for Biological Diversity; Food and Water Watch; Friends of the Earth; Lower San Pedro Watershed Alliance; Western Grid Group

    Comments of Sierra Club, et. al. on the Environmental Issues re the proposed Desert Southwest Expansion Project under PF26-9.

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    Scoping Comments of Sierra Club et al. Page 1 of 62 Desert Southwest Expansion Project, Docket No. PF26-9-000 August 5, 2026 UNITED STATES OF AMERICA FEDERAL ENERGY REGULATORY COMMISSION Transwestern Pipeline Company, LLC Docket No. PF26-9-000 SCOPING COMMENTS ON ENVIRONMENTAL ISSUES FOR THE PROPOSED DESERT SOUTHWEST EXPANSION PROJECT Pursuant to the Notice of Scoping Period Requesting Comments on Environmental Issues for the Planned Desert Southwest Expansion Project and Notice of Public Scoping Sessions issued July 6, 2026, we respectfully submit these comments on the appropriate scope of environmental review that the Federal Energy Regulatory Commission (“FERC” or “Commission”) must undertake under the National Environmental Policy Act (“NEPA”), 42 U.S.C. §§ 4321 et seq., and the Commission’s regulations, 18 C.F.R. pt. 380, when considering any future application by Transwestern Pipeline Company, LLC or its subsidiaries (“Transwestern”) for a Certificate of Public Convenience and Necessity under Section 7(c) of the Natural Gas Act (“NGA”), 15 U.S.C. § 717f(c), for its proposed Desert Southwest Expansion Project (“Project”). At a minimum, FERC must complete an environmental impact statement (“EIS”) for the Project that evaluates the environmental impacts discussed below. Commentators note, however, that their ability to identify issues FERC must assess during its environmental review has been hampered by the fact that only two of ten Draft Resource Reports are currently available to the public. We also urge FERC to provide a robust and accessible public participation process during preparation of the EIS. Scoping Comments of Sierra Club et al. Page 2 of 62 Desert Southwest Expansion Project, Docket No. PF26-9-000 August 5, 2026 I. FERC Must Complete an EIS for the Project Despite the Commission’s statement that it may decide to issue either an environmental assessment (“EA”) or a more detailed EIS for the Project, FERC, Notice of Public Scoping Sessions, Accession No. 20260706-3032 (July 6, 2026) (“Scoping Notice”) at 9, an EIS is legally required for a Project of this size and scope. NEPA allows a federal agency to conclude its environmental review after a shorter and simpler EA only if all the activity’s impacts are either not significant or remain “unknown,” 42 U.S.C. § 4336(b)(2); otherwise, the agency must prepare a longer and more detailed EIS. It is entirely implausible that a Project this large— involving “an additional approximately 2.3 billion cubic feet per day of incremental capacity,” 520 miles of new mainline pipeline, 186 miles of new lateral pipeline, and eight new compressor stations, Transwestern, Request for Approval to Utilize the Pre-Filing Process, Accession No. 20260327-5140 (Mar. 27, 2026) (“Request for Prefiling”) at 1–2—would have only an insignificant impact on the environment. An EIS will “normally” be prepared for “[m]ajor pipeline construction projects under section 7 of the Natural Gas Act using rights-of-way in which there is no existing natural gas pipeline.” 18 C.F.R. §§ 380.6(a), (a)(3). Approximately 20 percent of the Project is in areas without any existing pipeline systems or other infrastructure. Transwestern, Draft Resource Report 10, Accession No. 20260504-5183 (May 4, 2026) (“DRR 10”) at 5. An EIS also provides the public with more information compared to an EA and therefore more ability to meaningfully participate in and inform FERC’s decisionmaking process. Additionally, preparation of an EIS triggers a second timely intervention window in the application docket, whereas preparation of an EA does not. 18 C.F.R. § 380.10(a)(1). Scoping Comments of Sierra Club et al. Page 3 of 62 Desert Southwest Expansion Project, Docket No. PF26-9-000 August 5, 2026 II. Alternatives FERC must thoroughly evaluate alternatives to the Project, including the no-action alternative, and must give serious consideration to the possibility that there is no true public need for the Project. If there is not, the Commission should choose the no-action alternative and deny the Project’s application. A. No Action Alternative FERC must give serious consideration to the no-action alternative. Every NEPA review is required to thoroughly evaluate that alternative. Because this requirement is codified in NEPA itself, 42 U.S.C. § 4332(C)(iii), the rescission of the Council on Environmental Quality’s (“CEQ”) regulations implementing NEPA has no effect on this requirement. The no-action alternative provides an important baseline against which the Project’s effects can be compared by the Commission and the public to better understand the implications of FERC granting the certificate. See Ctr. for Biological Diversity v. U.S. Dep’t of Interior, 623 F.3d 633, 642 (9th Cir. 2010) (quoting Friends of Southeast’s Future v. Morrison, 153 F.3d 1059, 1065 (9th Cir. 1998)). For the no-action alternative to serve this important function, it must represent a world in which neither the Project nor any substantially similar pipeline is approved. FERC should not rely on Transwestern’s assertion that if this pipeline is not constructed, that “would likely result in the expansion of existing interstate natural gas pipeline systems [or] construction of a new pipeline system” with “environmental impacts similar to or greater than those of the proposed Project.” DRR 10 at 1. FERC must not minimize the Project’s potential impacts or undercut the importance of seriously considering the no-action alternative by assuming that if FERC denies the certificate, another pipeline would be built, creating similar or worse impacts on communities and the natural environment. Any other similar pipeline would also need to secure FERC’s Scoping Comments of Sierra Club et al. Page 4 of 62 Desert Southwest Expansion Project, Docket No. PF26-9-000 August 5, 2026 approval, and FERC must compare each pipeline before it not to a hypothetical alternative pipeline but to a world in which no additional pipeline is …

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  25. Comentarios del público

    6 comentarios de personas del público

    1. I am opposed to the construction and operation of the Desert Southwest Pipeline. Its construction would harm the fragile ecosystem it is slated to run through. Such gas pipelines are hazardous and can cause air pollution and explosions. All … Leer todo

      I am opposed to the construction and operation of the Desert Southwest Pipeline. Its construction would harm the fragile ecosystem it is slated to run through. Such gas pipelines are hazardous and can cause air pollution and explosions. All this for the sake of the AI boom—there must be another way to power this out-of-control trend. Not so fast, slow down and think about the land and species that will be harmed. Once harmed, there is no going back. The pipeline is unnecessary and should not go forward.

      Original en FERC · 20260805-5126 ↗
    2. I am strongly opposed to this new gas line being constructed. I do not support the burning of fossil fuels for data center energy. This is not a utility line to serve a community but it will hurt the communities and environment it runs … Leer todo

      I am strongly opposed to this new gas line being constructed. I do not support the burning of fossil fuels for data center energy. This is not a utility line to serve a community but it will hurt the communities and environment it runs through. It will leak at some point and negatively impact the environment and communities. The mitigations measures in place do not do enough to counter the negative impacts of constructing this gas line on the environment and the communities need to be compensated for moving deadly and explosive material through it.

      Original en FERC · 20260805-5110 ↗
    3. I am writing to express my concerns about and opposition to the proposed Desert Southwest Pipeline, which would extend 50 miles through the San Pedro River Valley. I am not an Arizona or New Mexico resident, but I am an avid birder, trained … Leer todo

      I am writing to express my concerns about and opposition to the proposed Desert Southwest Pipeline, which would extend 50 miles through the San Pedro River Valley. I am not an Arizona or New Mexico resident, but I am an avid birder, trained as an avian ecologist, who has spent a lot of time studying birds in this ecosystem. The San Pedro Watershed is an Important Bird Area (IBA) of global significance. It is home to two endangered bird species-the Southwestern Willow Flycatcher and the Yellow-billed Cuckoo. These species have suffered significant population declines, and the habitat provided by the San Pedro Watershed is vital for their recovery. Other species, including Mexican Spotted Owls, breed in nearby canyons. In all, more than 400 species of birds breed, winter, or refuel during migration in this desert ecosystem where water is at a premium. In fact, the San Pedro River's cottonwood-lined corridor provides critical stopover habitat for millions of migrating neotropical birds. It is one of only two major rivers that flow north out of Mexico into the United States and is one of the last large undammed rivers in the Southwest. Other wildlife, including mammals, fish, reptiles, and amphibians, rely on the San Pedro. It provides vital habitat and is an important wildlife corridor. This includes species typical of both the Chihuahuan and Sonoran deserts, as well as those that come north from the Sierra Madre in Mexico and south from the Rocky Mountains. The basin is home to 84 species of mammals, 14 species of fish, and 41 species of reptiles and amphibians. Of particular importance is the rare jaguar, which has been spotted in the area on numerous occasions. The ecosystem services and ecological values provided by the San Pedro River corridor are recognized by federal, state, and county governmental agencies, and as such, have high mitigation value. Construction of this project would endanger these values, placing them at an unacceptable risk of permanent damage. We know these pipelines eventually leak, and the construction of the Desert Southwest Pipeline would damage this fragile desert ecosystem destroying habitat and disrupting and displacing birds and wildlife. The purpose of this project is to provide fuel for power plants that data centers need. The public, on both sides of the political aisle, has made it clear that it does not want or support these massive data centers. They are going to be the big experiment that fails-before they even get off the ground because they are being fought every step of the way across the country. Listen to the public. The desert Southwest needs its water-not massive water and energy-consuming data centers. This area is suffering from a long-term drought. Parts of the Southwest may become uninhabitable as it runs out of ground and surface water. We have vastly underestimated how quickly groundwater is being depleted and are already in a state of emergency. We do not need pipelines or data centers. I also have concerns about other aspects of this project, including impacts to cultural resources, but have focused on what I know the most about. Please reject this proposal that the general public does not want or need. Authorizing it will damage this fragile ecosystem and would go against the public good. Thank you for considering these comments.

      Original en FERC · 20260805-5104 ↗
    4. Correction to previously submitted comment. The first paragraph should say “benefits to this project DO NOT outweigh the negative consequences” Thank you

      Original en FERC · 20260805-5102 ↗
    5. I am writing in support of all comments filed by Cascabel Conservation Association Sierra Club Earth Justice Lower San Pedro Watershed Alliance The Nature Conservancy Center for Biological Diversity.

      Original en FERC · 20260805-5099 ↗
    6. (Note: I do not live in Alabama but outside the United States of America, in Croatia, but the webform requires a state.) I submit these comments during the review of Energy Transfer's proposed Desert Southwest Expansion Project … Leer todo

      (Note: I do not live in Alabama but outside the United States of America, in Croatia, but the webform requires a state.) I submit these comments during the review of Energy Transfer's proposed Desert Southwest Expansion Project ("Project"), an expansion of the Transwestern Pipeline system. I wish to specifically address the segment of the proposed route that departs the Interstate 10 corridor near Willcox, Arizona, and crosses the [place] Preserve and Cooperative Management Area ("Muleshoe") and the Middle and Lower San Pedro River Valley. I respectfully request that FERC to require a transparent, evidence-based analysis of alternative routes that avoid the [place] Preserve and Cooperative Management Area and the Middle and Lower San Pedro River Valley. Potential Environmental Effects In addition to their ecological role, natural areas have an intrinsic value as do native plants, fungi and animals and they should have the right to live and survive in their homeland. They are also culturally important to First Nations’ Peoples. WATER RESOURCES AND WETLANDS Muleshoe: Hot Springs and Bass Canyon Watersheds Muleshoe encompasses the watershed of seven perennial streams and represents some of the best remaining aquatic habitat in southeastern Arizona. The Hot Springs watershed is federally designated as an Area of Critical Environmental Concern (ACEC), and both The Nature Conservancy and the Bureau of Land Management hold certificated instream flow rights in Hot Springs and Bass Canyons to sustain the perennial flows on which native fish and roughly 80% of the region's wildlife species depend at some point in their life cycle. The terrain is steep and rocky, with shallow soils that produce a rapid runoff response. Ground disturbance turns into rapid erosion and sediment discharge during storm events, degrading the pools, riffles and runs that native fish rely on. Soil compaction from heavy construction equipment can reduce water infiltration by more than 85%, further increasing runoff and erosion. Middle and Lower San Pedro River The Project reportedly would cross approximately 50 miles of the lower San Pedro River watershed, including a river crossing that Energy Transfer has indicated may be constructed as an under-river pipeline. The San Pedro is a groundwater-dependent, largely free-flowing river already under severe stress from more than 25 years of drought, recharge deficits, and groundwater over-pumping tied to agriculture and 45 years of regional mining. A proposed lateral line would supply a water-intensive energy generation facility in the San Manuel area, sited within seven miles upstream of thousands of acres of environmentally sensitive mitigation and conservation land, including federally designated exchange property tied to the Resolution Copper mitigation obligations and lands managed by the Bureau of Land Management, Arizona Game and Fish Department, Bureau of Reclamation, and Salt River Project. Water demand from the facility could undermine the ecological purpose of those mitigation investments and accelerate additional water-intensive industrial development, such as data centers, in a basin that does not have the water resources to support it. VEGETATION AND WILDLIFE According to the World Wildlife Fund (WWF) humans have killed about 70% of native animals since 1970. Of all land mammal biomass on Earth, domestic animals (such as cattle, sheep, pigs and dogs) make up 60%, humans make up 36%, whereas all wild mammals make up a mere 4%. Humans share this planet with millions of other species, yet human activities, especially animal farming and agriculture, take up about 50% of the Earth's land area whereas all the other species are left to share the remainder, which is getting smaller over the years as humans continue to take more land. Muleshoe Muleshoe's rugged native grasslands and perennial riparian communities are rarely matched in the ecoregion and are part of the second largest unfragmented landscape remaining in the Southwest, functioning as a critical wildlife connectivity corridor. Construction activity, including heavy equipment, trucks, and blasting, would introduce noise and lighting inconsistent with the Muleshoe Ecosystem Management Plan, disrupting animal communication and nesting birds. Project construction and maintenance would also increase wildfire risk and constrain the prescribed fire management that benefits native grasslands. I am especially concerned about the risk that open construction trenches pose to small, ground-dwelling vertebrates such as the Sonoran Desert Tortoise and Gila Monster, both protected under Arizona state law. Without escape ramps and daily monitoring, open trenches readily entrap and kill wildlife that cannot climb out. Blasting and other damage to rock outcrops can permanently destroy microhabitat used as winter shelter by lizards and snakes and as nesting habitat for species such as the rock wren; these features, once destroyed, are not readily replaced. Middle and Lower San Pedro River Valley The San Pedro's riparian corridor is recognized as a Global Important Bird Area and supports more than 400 bird species, an estimated 80 mammal species, 14 fish species, and more than 40 species of reptiles and amphibians. The watershed also anchors one of Arizona's most significant wildlife connectivity corridors, linking the Catalina, Rincon, and Galiuro mountain ranges. Pipeline construction along the river would require defoliating riverbanks, increasing the risk of erosion and pollutant runoff into the river and elevating the likelihood of severe flash flooding. The roads and easements needed to construct and maintain the pipeline would fragment one of the largest and rarest fully intact desert-river wilderness systems in the United States of America. Threatened and Endangered Species Seventeen federally listed threatened or endangered species inhabit the Project route in the Muleshoe and middle and lower San Pedro …

      Original en FERC · 20260805-5095 ↗
  26. The Nature Conservancy in Arizona

    Scoping Comment of the Nature Conservancy in Arizona on the environmental and social impact analysis re the planned Desert Southwest Expansion Project under PF26-9.

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    The Nature Conservancy www.nature.org [phone] 1510 E. Fort Lowell Rd, Tucson, AZ 85719 - 1 - Summary of Potential Impacts and Mitigation Desert Southwest Expansion Project, Transwestern Pipeline Company, LLC — FERC Docket No. PF26-9-000 Reference and incorporate TNC scoping letter dated 8/5/2026. Impacts are numbered; where a mitigation applies to more than one impact it is stated once and later rows cross-reference it by row number. For each mitigation measure, FERC should analyze its expected effectiveness and environmental consequences and impose enforceable requirements sufficient to ensure successful implementation, monitoring, corrective action, and continuing compliance. Potential Impact Proposed Mitigation / Requested Analysis Specific Impacts 1. FERC is still determining all necessary federal permits and approvals. These approvals and permits are likely connected actions whose impacts must be analyzed during the Project’s NEPA review. Thoroughly and completely identify all connected actions, including all necessary federal approvals and permits, and analyze, disclose, and consider their impacts in the NEPA environmental document. 2. Other pipeline proposals are in development, including the Western Gateway Pipeline (WGP) refined petroleum project, whose proponents have sought access to Muleshoe. Survey, construction, operation, and maintenance of the WGP and other pipeline and nonpipeline projects using the corridor are reasonably foreseeable, with social and environmental impacts that must be analyzed in the Project’s NEPA environmental document. Fully analyze the effects of the existing El Paso line and proposed WGP project in the NEPA document and identify and fully analyze other pipeline and non-pipeline projects in existence and in development that would utilize the Project corridor. 3. The Project may expand beyond the existing right-ofway to add new or expanded footprints for laterals, compressor stations, and other infrastructure. Construction activity will also occur outside the existing footprint. Analyze impacts to the existing right-of-way and any reasonably foreseeable expansion of the pipeline footprint and new or expanded footprints for laterals, compressor stations, and other infrastructure, including construction activity outside the existing footprint. 4. Alignment with the existing pipeline corridor should not be presumed to be the most appropriate or least harmful alternative; the corridor crosses Muleshoe and other sensitive environments including the San Pedro River. Alternate routes may have significant advantages over the existing pipeline corridor. Evaluate alternative alignments that do not cross Muleshoe and other sensitive lands, including transmission and interstate highway corridors that avoid lands with conservation and ecosystem-protection mandates. 5. To properly determine the significance of the Project’s impacts, both severity and scale matter. The temporary and long-term impacts on local people and resources warrant consideration proportionate to their actual effect on the ground. Analyze both the severity and scale of the Project’s impacts, giving local impacts, both temporary and long-term, consideration proportionate to their actual effect on local communities. The Nature Conservancy www.nature.org [phone] 1510 E. Fort Lowell Rd, Tucson, AZ 85719 - 2 - Land Ownership and Resource Stewardship 6. TNC acquired land in Muleshoe to cooperatively manage and protect semidesert grasslands and perennial riparian areas. Industrial projects like the proposed Project are inconsistent with TNC’s and Muleshoe’s purpose. See row 4 (evaluate alternative alignments, including transmission and interstate highway corridors, that avoid Muleshoe and other sensitive lands). TNC and its public partners have invested significant private and public resources over several decades to acquire, manage, restore, and sustain Muleshoe and its associated aquatic, riparian, grassland, and wildlife resources. The Project may impair these investments, and the conservation benefits they were intended to secure. Identify and analyze potential losses to past and ongoing public and private conservation investments. In evaluating mitigation, analyze the effectiveness of each measure and require enforceable mechanisms ensuring successful completion of Project mitigation and environmental- compliance obligations. 8. The land and resources at Muleshoe are jointly managed under the integrated Muleshoe EMP. The Project may impact the expectations, requirements, and commitments in the EMP, including the underlying Muleshoe CMA MOU, the Hot Springs Watershed ACEC, and the grazing leases. Identify and consider the Project’s impact on the Muleshoe EMP, the underlying CMA MOU, the Hot Springs Watershed ACEC, and the grazing leases in the NEPA review. 9. Project construction and maintenance activities will increase the risk of wildfire. Follow fire management timeline and stage restrictions; employ a fire watch and suppression protocol during construction and maintenance; restore periodic site access during construction to allow essential fire management activities. 10. The Muleshoe EMP aims to restore native grasslands using prescribed fire; the Project may limit or prevent burning in nearby grassland restoration units. Consult with land managers on potential prescribed fire timeline. 11. Project surveying, reconnaissance, construction, and maintenance activities may enable casual access by unauthorized vehicles into sensitive areas in Muleshoe and near the San Pedro River. Install a lockable gate for administrative access at the beginning of Forest Rd. 691 to control public access and limit unauthorized entry. Build a 500-yd pipe-rail fence along the west side of FR 691 with an access gate for permitted conservation access. 12. The proposed corridor crosses the only motorized vehicle entry to Muleshoe and may interfere with. land manager activities including monitoring, restoration, …

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  27. Comentarios del público

    2 comentarios de personas del público

    1. To the Federal Energy Regulatory Commission: I oppose this project for numerous reasons. It will cause extensive ecological damage to the San Pedro River Valley, and the benefits to this project outweigh the negative consequences. I am … Leer todo

      To the Federal Energy Regulatory Commission: I oppose this project for numerous reasons. It will cause extensive ecological damage to the San Pedro River Valley, and the benefits to this project outweigh the negative consequences. I am also opposed to this project being colocated with the existing gas lines in the area, especially in Oracle State Park. There are already large scars from the existing gas lines in Oracle State Park. The proposed gas line has the potential to create serious air pollution and combustible fuels. Also, the desert in this area is dry and highly combustible. We have experienced numerous threats from fire in the last 20 years. A major concern for me is the disruption to the already shrinking water supplies underground.I live in a home with a well. The well water comes from cracks and fissures in the ground. It is a delicate system of underground water sources. Studies must be completed to demonstrate the resulting environmental impacts, especially given the pipeline’s adjacency to and beneath the riverbed. This must include the impact on groundwater in and around the construction site. These studies should also include impacts of climate change as it is well know that water levels are dropping. I have attended two meeting presented by FERC and Energy Transfer. I do not feel confident the impact of this project is being throughly studied. I am not a scientist, but believe the scientific process if done objectively without interference from the executive branch of the Federal Government, will find that this project is detrimental to the San Pedro River Valley and the people who live around it. Respectfully,

      Original en FERC · 20260805-5084 ↗
    2. I am writing to express my opposition to the routing of Desert Southwest Expansion Project proposed by Energy Transfer through the San Pedro River valley. While I am not necessarily opposed to construction of a new pipeline, the current … Leer todo

      I am writing to express my opposition to the routing of Desert Southwest Expansion Project proposed by Energy Transfer through the San Pedro River valley. While I am not necessarily opposed to construction of a new pipeline, the current proposed route through the very fragile San Pedro River valley is ill advised and threatens an endangered area which should be considered a priority for preservation. The San Pedro River and it’s surrounding area was possibly the corridor through which humans were first able to pass through the surrounding desert as they migrated south, as shown by the Murray Springs and [place] sites from 11,000 - 13,000 years ago. The whole corridor up to where it meets the Gila river is still a largely unexplored archeological treasure. There are archaeological remnants everywhere. The San Pedro corridor is still the prime north-south corridor for wildlife, and has become more important as other previous corridors have dried up. 40-45% of all North American bird species (encompassing 2/3 of all North American bird diversity) use the San Pedro River valley for their migrations. If its ability to act as a corridor is lost, the United States could face a dramatic decline of their birds and other wildlife. Other animals, especially mammals and insects, may be even more dependent upon this corridor. Many areas within the San Pedro River area are absolutely incredible. Some places seem more like a very localized rainforest surrounded by desert, and the mesquite forest — the largest Velvet Mesquite forest in the US - seems like a fairyland. The surrounding desert is surprising in its diversity, and works as part of a larger interconnected ecosystem. The variety of plants and animals is amazing. I can find more species of insects - often rare - here in a day than you could find in a year in most other states in the US. I have often thought this should be a National Park - it is still largely pristine and its beauty is phenomenal. It should be protected for future generations and the essential services it provides but few recognize. This corridor is extremely fragile and has already been extensively impacted by drought, over-development and careless - and often unnecessary - encroachment by infrastructure. Once deserts are damaged it takes many centuries for them to recover, if they ever do. Today it is not like the Sahara, but it could easily become something similar. I think developing more long-term carbon-based infrastructure is not in our best interest and eventually we will regret it. While I would prefer not to need to keep on using methane as an energy source, I realize that in today’s society there is a unyielding thirst for it. It would make more sense to follow other already established pipelines (as this project does for most of its route) and not force their way through largely undeveloped, high value, unspoiled areas. But apparently they are cheaper to develop, since at this time they do not have to compensate for the destruction they cause. The route they have proposed through the San Pedro Valley almost appears intentional in the amount of devastation of a natural environment they could cause. There are much better routes which would not damage our heritage and future as much as the route they have selected. At this point, I recommend denying permits for the Trans-Western Pipeline Expansion Project until they are able to find a better route which avoids the impacts of passing through the San Pedro River valley. Thank you for your consideration of these points. Respectfully, [name] [name]

      Original en FERC · 20260805-5077 ↗
  28. Pima County

    Comments of Pima County, Arizona re the Desert Southwest Expansion Project under PF26-9.

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    Debbie-Anne A. Reese August 3, 2026 Federal Energy Regulatory Commission 888 First Street NE, Room 1A Washington, DC 20426 Re: Docket No. PF26-9-000 – Desert Southwest Expansion Project Dear Ms. Reese: Pima County is submitting the attached comments in response to the “Notice of Scoping Period Requesting Comments on Environmental Issues for the Planned Desert Southwest Expansion Project” issued by the Federal Energy Regulatory Commission (FERC) on July 6, 2026. We appreciate the opportunity to provide scoping comments on this planned project. Pima County is located at the confluence of the Sonoran and Chihuahuan Deserts, an area rich in biodiversity and cultural heritage. As part of the award-winning Sonoran Desert Conservation Plan (SDCP), Pima County has made extraordinary investment in securing property (fee title) and property interests (grazing leases, conservation easements, etc.) to conserve biologically diverse and culturally rich lands across the region. In many cases, these property interests also serve to fulfill the County’s long-term mitigation obligations under the MSCP and Section 10 Incidental Take Permit, which was issued by the U.S. Fish and Wildlife Service (FWS) in July 2016. Over the past 25 years the County has undertaken these and many other conservation efforts to further the SDCP’s goal of balancing the protection of the County’s cultural and natural resource heritage with an economically vigorous and fiscally responsible community. As we celebrate the 25th anniversary of the SDCP, we offer the attached comments to ensure that the County’s conservation objectives and the resources and investments we’ve put towards those objectives are fully considered as the National Environmental Policy (NEPA) process for this project moves forward. Sincerely, Jan Lesher Pima County Administrator Attachment c: Carmine DeBonis, Jr., Deputy County Administrator for Public Works Kris Gade, Director, Conservation Lands and Resources Eric Shepp, Director, Regional Flood Control District Kathryn Skinner, Department of Transportation Docket No. PF26-0000 – Desert Southwest Expansion Project Pima County Staff Comments Submitted August 5, 2026 Department of Transportation The Pima County Department of Transportation requests the opportunity to receive and review submittals regarding possible traffic control needs and evaluation of haul roads and building sites near Pima County DOT facilities, including Redington Rd. and San Pedro River Rd. Regional Flood Control District The Regional Flood Control District (District) has regulatory authority for floodplain management permitting for improvements such as the proposed project, including projects located on State Land. The three primary criteria for pipelines that the District would review are: 1. Impacts to Regulated Riparian Habitat: A goal of the Floodplain Management Ordinance is to avoid the disturbance of regulated riparian habitat, minimize disturbance if it cannot be avoided, and require mitigation when disturbance exceeds 1/3 of acre. Total avoidance is unlikely here but the District understands that the proponent will horizontally directional drill under the San Pedro River, which is recommended. There may be other large watercourses where it is prudent to horizontally directional drill rather than install the pipeline through conventional means. The District anticipates mitigation will be through an in-lieu fee. Even though the mitigation plan may not have on-site mitigation, it will need to discuss erosion control, invasive species monitoring and control, and methods to minimize the use of the disturbed areas by off road vehicle users and wildcat dumping. 2. Pipeline Construction: The District will require the applicant to develop the watershed hydrology for each watercourse and perform hydraulic analysis at each crossing. The purpose of the analysis is to establish the maximum anticipated scour depth and the erosion hazard area for each watercourse. The permit condition will require that the pipeline be buried below the maximum anticipated scour depth under the wash and through a distance associated with the appropriate erosion hazard area. 3. Appurtenant impacts: The pipeline is essentially below grade, but there will be occasional improvements on the surface for maintenance, inspection etc. These permanent impacts need to be outside of the floodplain, erosion hazard area, and riparian areas. In addition, temporary disturbances for laydown yards, etc. should be sited to avoid floodplains and riparian areas. Docket No. PF26-0000 – Desert Southwest Expansion Project Pima County Staff Comments Submitted August 5, 2026 Page 2 Conservation Lands & Resources Department The following resources are potentially affected by the “Preferred Route” and/or the “Proposed Route” and should be considered in the NEPA analysis: 1. Maeveen Marie Behan Conservation Lands System (CLS): The “Preferred Route” crosses through the Maeveen Marie Behan Conservation Lands System (CLS), a foundational element of the SDCP. Developed by a team of biologists, species experts, and agency scientists, the CLS identifies and maps areas where priority biological resources occur within Pima County and establishes conservation goals and development guidelines to ensure these resources are conserved. The CLS has guided County land use planning since 2001 and was used as a foundation for the County’s MSCP. It was designed to, among other things, preserve the contiguity of habitat at the landscape level and retain the connectivity of natural open space reserves with functional wildlife corridors. Linear developments such as this proposed pipeline may have significant impacts on the CLS by fragmenting important habitat blocks and severing wildlife corridors which would undermine the landscape-level connectivity the CLS was designed to protect. 2. Pima County Conservation Lands: Pima County currently owns and/or manages over 260,000 acres of lands in Pima County …

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  29. Comentarios del público

    2 comentarios de personas del público

    1. [name] A. [name], Vado, NM. I respectfully oppose routing the proposed Desert Southwest Expansion Project across my property. My wife and I built our home in 1984 and have lived here ever since. We raised our family on this land, and I … Leer todo

      [name] A. [name], Vado, NM. I respectfully oppose routing the proposed Desert Southwest Expansion Project across my property. My wife and I built our home in 1984 and have lived here ever since. We raised our family on this land, and I have personally farmed it for nearly 40 years. We have grown alfalfa to feed our horses, and we continue to keep horses and other animals, farm the property, and preserve it for future agricultural use. A permanent high-pressure natural gas transmission pipeline would permanently affect how we use and enjoy our property and would place lasting restrictions on land that is central to my family's life. Our property also contains an active irrigation water well located near the proposed pipeline alignment. This well is essential to our ability to irrigate the property and support our agricultural operation. I am concerned that construction activities, groundwater disturbance, or the long-term presence of a high-pressure transmission pipeline could affect the reliability or quality of this important water source. I respectfully request that the Commission carefully evaluate these potential impacts and require an alignment that avoids our irrigation well and protects our groundwater resources. I am also concerned about the impact a permanent pipeline easement may have on the value and future marketability of our property. The proposed route would impose permanent restrictions on my family's property while providing no corresponding benefit to our use of the land. It would affect our ability to farm, irrigate, and use our property as we have for decades. I respectfully request that the Commission require Transwestern to evaluate alternative alignments that avoid our home, our active agricultural operation, and our irrigation well while minimizing impacts to private landowners. Thank you for considering my comments

      Original en FERC · 20260805-5050 ↗
    2. The production of this pipeline will devastate the communities and ecosystem of everything around it and further beyond. I am completely against the pipeline and the resources put forth to develop the data center. They are all destroying … Leer todo

      The production of this pipeline will devastate the communities and ecosystem of everything around it and further beyond. I am completely against the pipeline and the resources put forth to develop the data center. They are all destroying the environment, economy, and health of our citizens. This data center and pipeline are wrong and should not be built.

      Original en FERC · 20260805-5044 ↗
  30. Archaeology Southwest

    Comments of Archaeology Southwest on the geographical and environmental breadth and magnitude of the project’s impacts and effects re the Desert Southwest Expansion Project under PF26-9.

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    August 5 2026 Laura V. Swett, Chair Federal Energy Regulatory Commission 888 First Street NE, Washington, DC 20426 Re: Scoping Comments on Desert Southwest Expansion Project (Docket #PF26-9000), Submitted via FERC eRegister Dear Ms. Swett: We appreciate the opportunity to comment on the TransWestern Pipeline Company’s proposed Desert Southwest Expansion Pipeline Project (Project). Because of the existing Desert Southwest pipeline’s environmental impacts and cultural resource adverse effects, and because these impacts and effects are significant, accumulating, and unanalyzed, Archaeology Southwest asks that the Federal Energy Regulatory Commission (FERC) revisit the geographical and environmental breadth and magnitude of the Project’s impacts and effects and include the full spectrum of these impacts and effects in scoping the Project. Our comments endorse and incorporate by reference the comments on this docket by the Lower San Pedro Watershed Alliance and the Cascabel Conservation Association and otherwise direct FERC attention to southern Arizona’s San Pedro Watershed, where Archaeology Southwest has led research and conservation work for decades. Archaeology Southwest is a private 501 (c) 3 non-profit organization based in Tucson, Arizona. We work with communities to understand and conserve places, as well as the histories, memories, and meanings they hold. We envision a future where people’s relationships with places thrive, guided by shared appreciation, respect, and responsibility. Archaeology Southwest is committed to Indigenous collaboration. We support preservation efforts led by Tribes, and commit to improved consultation and collaboration with Tribal members, communities, and Nations in the study and conservation of their Ancestors’ legacies. Archaeology Southwest has been active in archaeological research and preservation in the San Pedro River Valley for more than 30 years. Since the late 1980s, Archaeology Southwest, hundreds of volunteers, and dozens of partners have been integrating archaeological and ethnographic research, education, and preservation. Archaeology Southwest (then known as the Center for Desert Archaeology) conducted a 90 mile-long survey along the San Pedro River corridor in the early 1990s, followed by intensive cultural resource site mapping, surface surveys, and studies of museum collections and the results of low-impact excavations. A decade later, Archaeology Southwest collaborated with the Tohono O’odham Nation and the San Carlos Apache, White Mountain Apache, Zuni, and Hopi tribes to reveal the continuing importance of the San Pedro Valley cultural landscape to diverse traditional cultural communities (See Preservation Archaeology in the San Pedro, 2003, V 17 No 3 and One Valley, Many Histories: Tohono O’odham, Hopi, Zuni, and Western Apache History in the San Pedro Valley V 18 No 1). Archaeology Southwest recommends that Project planning and compliance efforts: 1. Increase the Number of Clear and Reasonable Alternative Project Routes Both the proposed and preferred routes identified in Resource Report 10, Maps 10A-5 and 10A-6 (Accession #20260504-5183, Appendix) traverse sensitive desert areas that include diverse and fragile cultural resources in the San Pedro Valley. No meaningful alternative routes are proposed. In Resource Report 10, TransWestern states that the current pipeline (TransWestern System) is not a reasonable alternative because it lacks capacity to meet the demands of the market. The Resource Report neglects the option of co-locating the larger capacity pipeline of this Project with the existing TransWestern System (see also comment 24 by FERC on co-location in Accession #2026-0618-3022). TransWestern not only fails to include this as an alternative but has yet to provide the public with a clear map showing where the TransWestern System is located in relation to the current Kinder Morgan/El Paso pipelines and the proposed Project. It is not possible for the public to provide informed comments or to assess the need for this Project without this information (see also comments 21 and 22 by FERC in Accession #2026-0618-3022 regarding maps and pipeline data). We request that co-location with the existing TransWestern System be considered an alternative. There are clear benefits to co-locating this Project along the existing route and then building out to the new areas as the market demands. Co-locating a pipeline along an existing utility corridor may have fewer and less severe and significant environmental impacts than putting a new pipeline through undisturbed desert areas. Monitoring and emergency response would be more efficient and cost effective in a limited response area. Additionally, landowner permissions and rights of way have presumably already been established for the existing pipeline corridor. Please identify reasonable alternatives so the impacts and effects can be analyzed for each, including the obvious ones of co-locating the Project with the existing TransWestern System, and following the existing industrial I-10 corridor. We also request that there be a “no action” alternative, which includes operation and maintenance of the existing pipeline. Detailed maps and clear names or identifiers for each alternate and lateral route need to be provided and consistently used in FERC documents. 2. Identify and Analyze All Reasonably Foreseeable Cultural, Historic, Spiritual, and Ecological Impacts to Cultural Resources from the Project The Valley has been (and still is) home to many diverse peoples. The Valley’s complex and continuing cultural history is recorded in Indigenous oral traditions and through many decades of archaeological survey, excavation, and ethnohistory and ecological research. Cultural resource site types known to exist in the Project vicinity include large pre-contact pithouse villages, platform mounds, ballcourts, agricultural terraces, religious structures, petroglyphs, pictographs, and historical period …

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  31. Hold the Line Campaign

    Comments of Hold the Line Campaign et al. in opposition to the Red Chile Lateral area of the Desert Southwest Expansion Project under PF26-9 et al.

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    FEDERAL ENERGY REGULATORY COMMISSION 888 First Street NE, Room 1A Washington, DC 20426 Submitted by: Hold the Line Campaign Jonathan Copeland, Representative 219 E Mills Ave. Unit 2319 El Paso, TX 79910 [email] August 5, 2026 Subject: Demand a Full, Rigorous Environmental Review of the Red Chile Lateral — and Consistent Treatment with Its Collocated Twin Pipeline Re: Red Chile Lateral, Desert Southwest Expansion Project — Docket No. PF26-9-000. Compare: Green Chile Lateral — Docket No. CP26-80-000, filed under Blanket Certificate Docket No. CP82-534-000 Dear Commissioners and FERC Staff, We, the undersigned organizations and individuals, write to express our unequivocal opposition to the proposed Red Chile Lateral in Doña Ana County, New Mexico, and to demand that the Federal 1 Energy Regulatory Commission (FERC) require a full, independent, and rigorous environmental review before this project moves forward. Why This Project Must Be Reconsidered: • Threats to Water and Land: The Red Chile Lateral is proposed just 50 feet from the Green Chile Lateral, over the same shared aquifers with Mexico — the Conejos-Médanos/Mesilla Bolson and Hueco Bolson — already stressed by drought and overuse. Two pipelines drawing on the same fragile desert water resources compound the risk of depletion and contamination, and construction will again disrupt fragile desert ecosystems, compact soil, and disturb natural drainage that farms, ranches, and wildlife depend on. • Cultural and Historical Destruction: On the immediately adjacent, collocated Green Chile Lateral, FERC Staff's own May 15, 2026 Environmental Information Request demanded “the New Mexico State Historic Preservation Office's finding of 'no historic properties,' 'no effect,' or 'no historic properties affected,' for the project, or an expected date of receipt.” Instead, the State Historic Preservation Officer has declined to concur with federal findings — so that finding still does not exist. Red Chile's cultural surveys demand independent scrutiny from the start, not a repeat of that same unresolved dispute. • Transboundary and Environmental Justice Violations: This project will disproportionately harm low-income, Latino, and Indigenous communities on both sides of the U.S.-Mexico border, worsening air quality and water scarcity. It touches binational commitments — including the La Paz Agreement and this region's own water-sharing obligations with Mexico — and prioritizes private financial interests over people. • A Double Standard in Plain Sight: Red Chile and Green Chile are functionally the same infrastructure — same diameter class, same county, same 50-foot right-of-way, built back-to-back to feed the same project. Yet Green Chile was pushed through under an abbreviated 1982 blanket certificate (Docket No. CP26-80-000, filed under original Blanket Certificate Docket No. CP82-534000), while Red Chile proceeds on a separate track (Docket No. PF26-9-000). FERC should not allow an applicant to seek a lighter review for one half of a single, integrated pipeline system simply by filing it differently. Both must be evaluated together — exactly as FERC Staff already required for Green Chile, whose May 15, 2026 Environmental Information Request demanded analysis of “Project Jupiter and all associated facilities.” Neither lateral should receive less scrutiny than the harm it can cause deserves. Once operational, this system will enable Project Jupiter, an AI data center whose own permit filings project more than 10 million tons of CO₂-equivalent emissions annually. Our Demands We call on FERC to: • Require a full, independent environmental review of the Red Chile Lateral — not narrowed or streamlined to match the shortcuts sought for Green Chile — including: 2 – Independent, locally led surveys of rare plant species, cultural sites, and ecological resources. – A transboundary impact assessment in consultation with U.S. and Mexican agencies and affected communities. – Public scoping sessions for both pipelines in Doña Ana County, New Mexico, and Ciudad Juárez, Mexico, to ensure meaningful input from all impacted stakeholders. – A cumulative-impacts analysis that treats Red Chile and Green Chile as the single, integrated system they are — not two unrelated filings — and that includes, in FERC Staff's own words from its May 15, 2026 Environmental Information Request, “Project Jupiter and all associated facilities.” FERC has already required this standard for Green Chile; Red Chile must meet the same standard, not a lesser one. • Confirm NHPA Section 106 consultation is fully and independently completed for Red Chile before any approval, producing exactly what FERC Staff already demanded for Green Chile: “the New Mexico State Historic Preservation Office's finding of 'no historic properties,' 'no effect,' or 'no historic properties affected,' for the project, or an expected date of receipt” — not treated as resolved by association with Green Chile's own still-unresolved survey. • Prioritize environmental justice by centering the voices of marginalized communities who will bear the brunt of this project's harms. We Stand United The Red Chile Lateral is not in the public interest, and it should not benefit from a lighter review than the harm of two pipelines on one aquifer deserves. It threatens our land, water, heritage, and future. We urge FERC to listen to the people — not private for-profit companies — and hold this project to the full standard the law requires. Sincerely, The undersigned organizations and individuals Signatories — Directly impacted — members of the impacted community near the route (47) 1. Sandra Blaso (ZIP 88012) 2. Veronica Carbajal (ZIP 79930) 3. Esperanza Chairez, Youth United for Climate Crisis Action (ZIP 88001) 4. Denise Chavez (ZIP 88005) 5. Jay Choate (ZIP 88012) 6. James Conant (ZIP 88011) 7. Kim Coryat (ZIP 88012) 3 8. Ericha Courtright (ZIP 88011) 9. Cindy DeLanoy, GlasSlipper (ZIP 88005) — indicated they have land …

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  32. Hold the Line Campaign

    Comments of Hold the Line Campaign requesting an Environmental Impact Statement re the Desert Southwest Expansion Project under PF26-9.

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    FEDERAL ENERGY REGULATORY COMMISSION 888 First Street NE, Room 1A Washington, DC 20426 Submitted by: Hold the Line Campaign Jonathan Copeland, Representative 219 E Mills Ave. Unit 2319 El Paso, TX 79910 [email] August 5, 2026 Re: Transwestern Pipeline Company, LLC — Desert Southwest Expansion Project (Red Chile Lateral) — Docket No. PF26-9-000 Stakeholder Comments and Request for an Environmental Impact Statement Dear Secretary Reese: Hold the Line Campaign ("HTLC") respectfully submits the attached comments for the pre-filing record in the above-referenced docket, and requests that the Commission prepare a full Environmental Impact Statement for this project. 1 The attached comments were submitted by members of the public through HTLC's public sign-on process. Each commenter writes in their own name and speaks to their own experience and concerns. HTLC transmits their comments so that they are before the Commission as it defines the scope of its environmental review. The views, statements, and characterizations in the attached comments are those of the individual commenters alone and do not represent the views or positions of Hold the Line Campaign. More than seventy members of the public have joined HTLC's sign-on effort concerning this project, and the [20] individuals whose written comments are attached chose to provide statements of their own. The attached comments — from residents of Doña Ana County, New Mexico, and the surrounding New Mexico, Texas, and border region — raise recurring and serious concerns about the Red Chile Lateral and the development it would serve, including: Water resources and drinking water, including risks to private wells, groundwater, and the shared regional aquifer, during a prolonged and severe regional drought; Air quality and public health, including concerns raised by residents living in and near areas that already face air-quality challenges; Cultural, historic, and archaeological resources along the proposed route, including the absence of a completed cultural-resource survey; Cumulative impacts arising from the Red Chile Lateral together with the collocated Green Chile Lateral and the data-center development the pipelines would serve; Wildlife, dark skies, and the surrounding desert landscape; and Public information, including concerns that residents have not been adequately informed about the project's impacts. The need for a thorough environmental review here is underscored by the Commission's own approach to the collocated Green Chile Project. In that proceeding, the Commission's Office of Energy Projects has already directed the applicant to include "Project Jupiter and all associated facilities" among the past, present, and reasonably foreseeable future projects analyzed for cumulative effects, and to describe the cumulative and overlapping effects on each environmental resource. See Environmental Information Request, Transwestern Pipeline Co., LLC, Docket No. CP26-80-000, Accession No. 20260515-3050, at Item 3 (FERC Office of Energy Projects, May 15, 2026). Because the Red Chile Lateral is collocated with the Green Chile Lateral and would serve the same Project Jupiter development, the same cumulative-effects analysis — including Project Jupiter and its associated facilities — is warranted here. HTLC also respectfully raises a matter of public participation. The Commission's in-person scoping sessions for this project, held in late July 2026, did not include a session in Las Cruces — the largest community in the affected area of Doña Ana County — with the nearest New Mexico sessions held in Deming and in Chaparral. Given the size of the affected community and the level of public interest reflected in the attached comments, HTLC believes additional opportunity for the public to participate is warranted before the environmental document is prepared. 2 Given the range and seriousness of these concerns, the size and character of the project, and the level of public interest reflected in the attached comments, HTLC respectfully requests that the Commission: 1. Prepare a full Environmental Impact Statement for this project; 2. Ensure that each of the concerns identified by the commenters is included within the scope of the Commission's environmental review; 3. Analyze the cumulative effects of the Red Chile Lateral together with Project Jupiter and its associated facilities, consistent with the analysis the Commission has already directed in the collocated Green Chile proceeding (Docket No. CP26-80-000); 4. Hold an additional in-person scoping session in Las Cruces, Doña Ana County, so that residents in the largest affected community have a meaningful opportunity to participate; 5. Extend the scoping comment period to allow additional written and oral public input; and 6. Enter the attached comments into the record for Docket No. PF26-9-000. HTLC appreciates the opportunity to participate in the pre-filing process and looks forward to continued engagement as the Commission's review proceeds. Respectfully submitted, Jonathan Copeland Hold the Line Campaign Attached: Desert Southwest — Stakeholder Comments for Filing (Docket No. PF26-9-000) 3

  33. Saguaro Juniper Corporation

    Comments of Saguaro Juniper Corporation re the Desert Southwest Expansion Project under PF26-9.

  34. Comentarios del público

    5 comentarios de personas del público

    1. I'm very concerned this literal power grab by Big Tech and major utility companies that are pushing for this 516-mile "Desert Southwest Pipeline," literally one of the worst ideas I've heard this week and that is saying a lot because this … Leer todo

      I'm very concerned this literal power grab by Big Tech and major utility companies that are pushing for this 516-mile "Desert Southwest Pipeline," literally one of the worst ideas I've heard this week and that is saying a lot because this administration, the people in it, and their ideas is utter GARBAGE. We're talkin the bottom of the barrel of humanity here. Utter scum. We don't want these data centers, in Texas, in New Mexico, in Arizona. Are we in a Dr. Seuss novel right now? We don't want your filthy, resource-sucking, poorly planned garbage sucking the life out of our backyards in any state you utter morons. Dear FERC, please devise a frickin system where We, The People, can just say no. You waste our time and money making us fight this selfish, short-sighted insanity. Considering and reconsidering dams on the LIttle Colorado River for example. What a gargantuan waste of brain cells and energy. The pipeline and data centers would devastate communities, wildlife, and the environment, and raise electricity and water costs for working people. The Southwest is already facing a severe water crisis. Data centers require millions of gallons of water for cooling, which would make what little water the region has even scarcer. Fracking in the Permian Basin also contaminates groundwater. I’m also concerned that the pipeline would cut through fragile ecosystems, including the Chihuahuan Desert and Otero Mesa, home to more than 1,000 native species and sacred cultural sites. In Arizona, this miserable idea would threaten the Lower San Pedro Watershed, one of the nation's largest and most rare intact desert-river wilderness. Irreparable harm would be done to San Pedro's endangered species. Construction would threaten artifacts and sites significant to the Apache, Tohono o'Odham, Hopi, and Zuni Nations, among others. I know this administration doesn't give a flying frick about native peoples but they are the WORST of America and do not represent how most Americans feel. Ooh I can't wait to vote them out! Further, transporting and burning this fracked gas would release an estimated 56 million metric tons of CO₂ annually—equivalent to 15 coal plants—worsening the very droughts and extreme heat already impacting the water supply that communities and wildlife rely on. Residents all along the proposed route are worried about water usage and compressor noise pollution that would result in habitat disruption, visual impacts, and safety risks associated with high-pressure gas infrastructure. People across Texas, New Mexico, and Arizona would also be forced to live with the constant threat of leaks, explosions, and methane exposure, and other pollution that would make them sick. This is unacceptable. I feel like I'm in a horror movie where all the scientists are warning us about climate change and still we continue to do stupid crap like this. The west and desert southwest is LITERALLY ON FIRE you frickin morons. BLOCK THE DESERT SOUTHWEST PIPELINE AND STAND UP FOR THE PEOPLE WHO LIVE THERE. You can not sacrifice our homes, sacred land, and access to water so gas and Big Tech companies can rake in billions more dollars in profits at our expense. This is not a GD safety/supply emergency as this administration and their rich friends would like us believe. If they could get their dumb butts out of Iran this idiotic pipeline wouldn't be a discussion at all. Because again, this is evil and should not be considered. Please don't ruin my desert, our desert, this desert. And apologies to the staffer who has to read my rant - I'm too tired for decorum.

      Original en FERC · 20260805-5005 ↗
    2. The Coalition for Sonoran Desert Protection encourages FERC to give particular attention to the proposed pipeline's potential impacts within the San Pedro Valley. The valley contains one of the Southwest's most intact roadless landscapes … Leer todo

      The Coalition for Sonoran Desert Protection encourages FERC to give particular attention to the proposed pipeline's potential impacts within the San Pedro Valley. The valley contains one of the Southwest's most intact roadless landscapes and serves as a regionally significant wildlife movement corridor connecting the Sky Islands of southeastern Arizona, and protected landscapes such as Saguaro National Park and Catalina National Forest, with central Arizona and New Mexico. Any proposed route must seriously consider the impacts to ecological integrity and landscape connectivity associated with new access roads, construction disturbance, and long-term operation. We encourage FERC to prioritize alternatives that avoid habitat fragmentation of intact roadless areas and high-value wildlife linkages, and to incorporate the best available science, including regional connectivity analyses and local conservation planning efforts, into its review. Protecting these connected landscapes will help sustain the biodiversity and ecological resilience that make the San Pedro Valley nationally significant.

      Original en FERC · 20260805-5003 ↗
    3. As a resident of Oracle, AZ, I am strongly opposed to the Desert Southwest Expansion Project constructed and adopted by Transwestern Pipeline Company, LLC (Transwestern) in Texas, New Mexico, and Arizona. With the prolonged drought that has … Leer todo

      As a resident of Oracle, AZ, I am strongly opposed to the Desert Southwest Expansion Project constructed and adopted by Transwestern Pipeline Company, LLC (Transwestern) in Texas, New Mexico, and Arizona. With the prolonged drought that has seriously affected the water aquifers throughout Arizona, there is a scarcity of water already. I understand that this gas pipeline would primarily enable more AI data centers to be built. Since these data centers use a tremendous amount of water to cool them, this would be a disaster for the farmers, ranchers, and public that depend on the water for their living, since the aquifers already are being depleted at an alarming rate. The gas pipeline, which is planned to go through the lower San Pedro watershed, would also be a disaster for the migrating birds that depend on this wildlife connectivity corridor. It is also home to two endangered bird species: the yellow-billed cuckoo and the southwestern willow flycatcher. Threatened Mexican Spotted Owls are found in two nearby canyons. This riparian corridor also supports more than 400 bird species, about 80 mammal species, 14 fish species, and over 40 species of reptiles and amphibians. All of this wildlife would be endangered by the building of the Desert Southwestern pipeline project. The San Pedro Valley contains more than 2,300 documented cultural sites, some over 12,000 years old. The Valley was and still is home to diverse peoples including indigenous, early ranchers, and Mexican homesteaders. Industrial alteration of the San Pedro Valley will cause irreparable harm to it as a living, traditional cultural place. Consultation with Tribes is required in order to mitigate harmful effects of pipeline construction and operation. This would include the Tohono O’odhame Nation and San Carlos Apache Tribes. These are just a few of the negative environmental and cultural impacts that would be a result of the proposed gas pipeline. I strongly urge this project be denied.

      Original en FERC · 20260805-5002 ↗
    4. The Desert Southwest pipeline project is a poorly-designed ecological disaster just waiting to happen. Please do the right thing and do not approve this project. Specifically I am opposed to it passing through the San Pedro Valley and … Leer todo

      The Desert Southwest pipeline project is a poorly-designed ecological disaster just waiting to happen. Please do the right thing and do not approve this project. Specifically I am opposed to it passing through the San Pedro Valley and Oracle State Park. The San Pedro wilderness is already imperiled. If this pipeline runs beneath the river there will be severe hydrological impacts in an already stressed areas. This project threatens cultural resources, habitat, and wildlife along the river. It creates unwanted infrastructure in small and peaceful towns such as Oracle, AZ. It is simple---we don't need more power for data centers, we need water. Stop this project in its tracks now.

      Original en FERC · 20260805-5001 ↗
    5. Dear FERC, Please register my comment as opposed to this project for the following reasons: Health and Safety: Excessive dust during construction and from disturbed ground following construction is a health (valley fever and lung disease) … Leer todo

      Dear FERC, Please register my comment as opposed to this project for the following reasons: Health and Safety: Excessive dust during construction and from disturbed ground following construction is a health (valley fever and lung disease) and Safety issue. ATV's should be prohibited from driving on the corridor. Noise: Substations are excessively noisy and must be located far from populated areas. Environmental: Natural Gas is an extracted product and can in no way be considered a sustainable resource. Project creates excessive strain on local communities roads and well being. Please do not approve this project. Thank you.

      Original en FERC · 20260805-5000 ↗
  35. El Paso Water Utilities pub. svc. Board

    Comments of El Paso Water Utilities Public Service Board on existing water lines and planned future water infrastructure within the area of the Desert Southwest Expansion Project under PF26-9.

  36. Lower San Pedro Watershed Alliance; Cascabel Conservation Association

    Comments of Lower San Pedro Watershed Alliance and the Cascabel Conservation Association re the scoping period for the Planned Desert Southwest Expansion Project under PF26-9.

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    1 August 4, 2026 Federal Energy Regulatory Commission (FERC) c/o Laura V. Swett, Chair 888 First Street, NE Washington, DC 20426 Lower San Pedro Watershed Alliance, Cascabel Conservation Association Submit Comments on Desert Southwest Expansion Project in Docket # PF26-9-000 (Submitted via FERC eRegister filing docket) To the Federal Energy Regulatory Commission: These comments are being submitted on behalf of the Lower San Pedro Watershed Alliance and the Cascabel Conservation Association regarding the scoping period for Energy Transfer’s Desert Southwest Expansion, of the Transwestern Pipeline Expansion Project. The Lower San Pedro Watershed Alliance is the only all-volunteer landowner-based organization in the region and was founded to protect the ecological integrity of the lower San Pedro watershed as a whole. One hundred of our more than 250 members are landholders in the lower San Pedro watershed. The Cascabel Conservation Association is dedicated to the collaborative stewardship of the Middle San Pedro River watershed in a way that promotes the health, stability and diversity of the whole community, including its earth, waters, plants, and animals. The group strives to integrate the needs of the land with the needs of a sustainable human community. The following comments are a supplement to both organizations’ previous pre-filing comments submitted to FERC docket PF26-9-000 [June 26, 2026 – Lower San Pedro Watershed Alliance] and [May 8– Cascabel Conservation Association]. Our existing concerns, related in both pre-filing letters, should be duly noted and re-reviewed regarding ecological, Tribal, hydrological and cultural impacts to this sensitive area in southeastern Arizona. Additionally, we draw the following concerns to attention for FERC’s further consideration before approval of this project and its proposed route. We suggest a need for: • Enhanced hydrologic studies, and avoidance of a river crossing: The method of horizontal direct drilling (HDD) proposed to cross beneath the San Pedro River is of great concern for a riparian and riverine ecosystem associated with 190,000 acres of conservation and mitigation property. Numerous reports, including the New Jersey Department of Environmental Protection Final Report on Directional Drilling, indicate that HDD can result in any of the following harms: 2 o Frac-outs in which drilling mud breaks through the ground or riverbeds under high pressure, harming local water sources, land and wildlife. o Water pollution from escaped slurry and chemicals that can seep into and ruin clean underground water sources. (While 80% of Arizona relies solely on groundwater for its sustenance, 100% of our communities rely on clean groundwater for drinking, gardening, farming and daily living). o Aquifer cross-contamination caused when deep bores accidentally connect separate underground water layers, spreading pollutants. The impacts of this drilling technique on the unique arid-land hydrogeology require additional study. Regional geology, overall, in the Lower and Middle San Pedro watershed is extremely complicated and poorly studied. This type of drilling on the San Pedro River has the potential to disrupt shallow, alluvial groundwater systems, potentially connecting them with deep alluvial aquifers, further dewatering the San Pedro River. Communities in the project zone and downriver should be consulted on 1) the science behind the proposed technology 2) alternative options – preferably complete avoidance of an underground or above-ground river crossing 3) assessed risks and potential failures based on the technology 4) mandatory ongoing water and soil testing available to the public for breaches alongside and beneath the river 5) clearly defined failure/mitigation planning • Understanding arid land surface hydrology and applying its principles to all road construction methods: Arizona’s desert landscapes are unique, with fragile soils prone to erosion. All linear infrastructure – whether the pipeline itself or roads made to support its construction – will detrimentally alter surface water hydrology. In our semi-arid watershed, linear infrastructure redirects runoff from natural channels, concentrating flow down disturbed surfaces. Soil compaction associated with construction and use of roads further exacerbates these effects. In addition to increasing erosion and the corresponding increase of infill in pools that are important habitat for native fish, the redirection of runoff will dehydrate surrounding landforms and worsen the habitat impact of this project. These changes to landform also reduce the dwell time of runoff on the land, decreasing regional recharge in a region already suffering from longterm groundwater declines. Rigorous study of surface hydrology must be conducted to ensure the cumulative impacts of this construction project are understood and that appropriate design features (e.g, rolling dips, Natural Infrastructure in Dryland Streams) are implemented to offset surface hydrology impacts. • Reinitiation of cumulative impacts into project analysis: This project should include a robust cumulative impacts analysis that evaluates how the proposed project would interact with other past, present, and reasonably foreseeable future actions throughout the region. Pipeline construction does not occur in isolation. Current, ongoing impacts associated with the existing pipeline architecture, newly proposed energy infrastructure, past and proposed mining operations, transportation corridors, renewable energy developments, groundwater withdrawals, and increasing climate-related stressors collectively affect wildlife habitat, water resources, air quality, and public lands. Without a comprehensive cumulative impacts analysis, decision makers and the public cannot fully understand or effectively comment on the project's scope. o Perhaps the largest future cumulative impact that must be considered as part of FERC’s planning is the creation of a …

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  37. Comentarios del público

    2 comentarios de personas del público

    1. I respectfully submit these comments as the owner of property directly affected by the proposed Desert Southwest Expansion Project. In 1975, when I was in my twenties, I purchased the first five acres of what would become our family's … Leer todo

      I respectfully submit these comments as the owner of property directly affected by the proposed Desert Southwest Expansion Project. In 1975, when I was in my twenties, I purchased the first five acres of what would become our family's home. Owning a small piece of rural land where I could raise horses, build a home, raise a family, and spend my life was my dream. In 1984 we built our house, in 1995 our family was able to purchase the adjoining property, bringing our land to approximately 12 acres. That dream became our home. This property is much more than acreage. It is where we have built our lives. We specifically chose a rural lifestyle, and we continue to keep horses and other animals and farm the land. We have historically grown alfalfa to feed our horses, and although we have not planted alfalfa in recent years, preserving our ability to return the land to agricultural production remains very important to us and the land we will leave to our children. A permanent high-pressure natural gas transmission pipeline would forever change the character of our home. It would permanently restrict how we can use our property, limit future agricultural opportunities, and burden land that we have spent decades caring for and improving. Beyond the physical restrictions, it would change how I feel about the place where I planned to spend my life. I am also concerned that placing a permanent transmission pipeline across our property will reduce its value and marketability. Future buyers will be less willing to purchase property encumbered by a high-pressure pipeline easement, diminishing the value of everything our family has worked so hard to build. The proposed route would impose permanent restrictions on the property that has been my lifelong dream while providing no corresponding benefit to my family's use of the land. I respectfully request that the Commission require Transwestern to thoroughly evaluate reasonable alternative routes that avoid our property. Thank you for your consideration of these comments.

      Original en FERC · 20260804-5085 ↗
    2. I respectfully request that the Commission require Transwestern to fully evaluate alternative alignments that avoid routing this high-pressure natural gas transmission pipeline across my family's property. Our 12-acre property is our home … Leer todo

      I respectfully request that the Commission require Transwestern to fully evaluate alternative alignments that avoid routing this high-pressure natural gas transmission pipeline across my family's property. Our 12-acre property is our home and an active rural property where we continue to keep horses and other animals and farm. We intentionally chose this lifestyle because we value the freedom to use our land for agriculture, livestock, and future generations. Although we have not grown alfalfa in recent years, we want to preserve our ability to resume growing hay for our horses whenever we choose. A permanent pipeline easement would restrict future improvements, limit agricultural opportunities, and permanently burden our property. I am also concerned that a high-pressure transmission pipeline will diminish the property's value and marketability because of the permanent easement and perceived safety concerns. The proposed route would impose permanent restrictions on our family's property while providing no corresponding benefit to our use of the land. I respectfully request that the Commission require Transwestern to evaluate alternative alignments that avoid our property.

      Original en FERC · 20260804-5072 ↗
  38. New Mexico Department of Game and Fish

    Comments and Recommendations of the New Mexico Department of Game and Fish, aka New Mexico Department of Wildlife on the Notice of Scoping Period on Environmental Issues et al. re the Planned Desert Southwest Expansion Project under PF26-9.

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    GOVERNOR Michelle Lujan Grisham STATE OF NEW MEXICO DEPARTMENT OF WILDLIFE One Wildlife Way, Santa Fe, NM 87507 Tel: [phone] | Fax: [phone] For information call: [phone] https://wildlife.dgf.nm.gov STATE WILDLIFE COMMISSION RICHARD STUMP Chair Santa Fe FERNANDO CLEMENTE, JR. Vice Chair Sunland Park KYLE HARWOOD Santa Fe TIRZIO J. LOPEZ Cebolla DR. CHRISTOPHER C. WITT Albuquerque DIRECTOR AND SECRETARY TO THE COMMISSION Michael B. Sloane 3 August 2026 Debbie-Anne A. Reese, Secretary Federal Energy Regulatory Commission (FERC) 12225 Wilkins Avenue Rockville, MD 20852 RE: Desert Southwest Expansion Pipeline Project, Transwestern Pipeline Company, LLC. FERC Docket No. PF26-9-000. NMDOW No. NMERT-6261. Dear Ms. Reese, The New Mexico Department of Wildlife (Department) has reviewed the Desert Southwest Expansion Pipeline Project and appreciates the opportunity to participate in the initial scoping process required by the National Environmental Policy Act (NEPA). Transwestern Pipeline Company, LLC (Transwestern) is proposing to expand its existing pipeline system by constructing and operating a 48-inch diameter mainline pipeline, lateral pipelines, compressor stations, meter stations, and other above-ground facilities in Arizona, New Mexico, and Texas. The Department provides the following comments and recommendations to minimize potential impacts to wildlife during pipeline construction activities. All migratory birds are protected against direct take under the federal Migratory Bird Treaty Act (16 U.S.C. Sections 703-712), and hawks, falcons, vultures, owls, songbirds, and other insecteating birds are protected under New Mexico State Statutes (17-2-13 and 17-2-14 NMSA), unless permitted by the applicable regulatory agency. To minimize the likelihood of adverse impacts to migratory birds, nests, eggs, or nestlings, the Department recommends that ground disturbance and vegetation removal activities be conducted outside of the primary migratory bird breeding season of April 15-September 1. Breeding season may begin earlier for raptors or when working in low-elevation habitats such as deserts. If ground-disturbing and clearing activities must be conducted during the breeding season, the area should be surveyed for active nest sites (with birds or eggs present in the nesting territory) and avoid disturbing active nests until young have fledged. For active nests, establish adequate buffer zones to minimize disturbance to nesting birds. Buffer distances should be at least 100 feet from songbird and raven nests; 0.25 miles from most raptor nests; and 0.5 miles for ferruginous hawk (Buteo regalis), golden eagle (Aquila chrysaetos canadensis), peregrine falcon (Falco peregrinus), and prairie falcon (Falco mexicanus) nests. Active nest sites in trees or shrubs that must be removed should be mitigated by qualified, permitted biologists or wildlife rehabilitators. Department biologists are available to consult on nest site mitigation and can facilitate contact with qualified personnel. Removal of active nests of state-protected species may require a scientific collection permit; contact the Department's Wildlife Permits Manager Debbie-Anne A. Reese, Secretary 3 August 2026 Page -2- at [email] for more information. The Wild Take Unit at the USFWS, which issues take and relocation permits for migratory birds, can be reached at [email]. The list of New Mexico Species of Greatest Conservation Need (SGCN) (see link, page 18, table 5) and the federal list of Birds of Conservation Concern should be reviewed to fully evaluate potential effects to migratory birds from your proposed project. Federal agencies are also required under Executive Order 13186 to implement standards and practices that lessen the amount of unintentional take attributable to agency actions. These conservation measures are strongly recommended to ensure persistence of migratory bird species whose populations are small and/or declining within New Mexico. Please also consider impacts to pollinating insects from the removal of flowering plants and ground-disturbing activities. If possible, avoid removing flowering plants when bees and other insect pollinators are most actively foraging (March-October), including early flowering native tree and shrub species. Also avoid any observed bumble bee (Bombus spp.) nest sites using a buffer of at least 30 feet. Implement measures to prevent the spread of noxious weeds and invasive plants, including removing dirt, debris, and plant parts from equipment before bringing it on site. Open trenches excavated for underground oil and gas pipelines, powerlines, and other underground infrastructure can unintentionally entrap and cause the unnecessary mortality of amphibians, reptiles, and small mammals, can cause injury to large mammals, and can damage underground bee nests. Trapped animals can die from exposure, starvation, crushing from pipe-laying, entombment from trenching backfilling, drowning, and predation. This unnecessary wildlife mortality can be avoided by implementing conservation measures, including concurrent trenching, pipe-laying, and backfilling operations to minimize the amount of trench left open overnight or longer; construction of escape ramps; and employing biological monitors to remove trapped animals. Periods of highest activity for amphibians and reptiles vulnerable to entrapment include summer months and wet weather, and they can be active both day and night. Small mammals subject to entrapment are active yearround and generally most active at night. Conducting pre-trenching wildlife surveys, especially for bumble bee (Bombus spp.) nests, which may occur in abandoned rodent holes and other cavities and be present yearround, and active burrows, can aid in avoiding nest and burrow destruction. The Bumble Bee Nest Quest project provides some information on what to look for when searching for bumble bee nests. Implementing the general trenching conservation measures outlined in the …

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  39. Comentarios del público

    7 comentarios de personas del público

    1. As a Saguaro Juniper member and active member in Cascabel Community located in the San Pedro River Valley north Benson, the Desert Southwest Pipeline project concerned me a lot about all the threat it represents for the valley and its … Leer todo

      As a Saguaro Juniper member and active member in Cascabel Community located in the San Pedro River Valley north Benson, the Desert Southwest Pipeline project concerned me a lot about all the threat it represents for the valley and its inhabitants. As a matter of fact, the San Pedro Valley is the second largest unfragmented land in Arizona and New Mexico in addition to be a cultural , historical and spiritual land for the Hopi, Zuni, Apache and Sobaipuri O’odham people, as well as those of early ranchers and Mexicain-American homesteaders. Living in Cascabel, is choosing to live surrounded with wild nature and traces from the past stories of the humans living on this land. It is a unique way to consider animals and vegetation that belong here and to protect them by respecting their wilderness, and being committed to this land. I am connected to Cascabel because I crave to nurture healthy relationships among wildlands, wildlife, pastoral livestock and people. For that matter, the Desert Southwest Pipeline project is a direct threat to the unique biodiversity of the Valley and to the way of living to its inhabitants. The main problem is that the impact of the Pipeline construction will be noticed during its process and longer after it is constructed. My main fear starts with the construction itself: the way the heavy machinery will be used for vegetation cleaning, inevitably leading to destroying endemic vegetal and animal inhabitants. The noise and vibrations linked to the infrastructure will also disturb the ecosystem, which is already very sensitive. It will ruin the only ‘free-man’ area in the desert where wildlife can thrive in peace. Also, this big infrastructure, as what has been demonstrated with the Sunzia Project, could easily be a main factor to accelerate soil erosion and underwater disturbance. From the community point of view, we live here to be more connected with nature, to strive to live more respectfully with the other being, and in a quiet environment, far from the noise of the city and even more from the industrial sites. When the pipeline will be done, what kind of assurance do we have for the health of our community? Acknowledging the project of the pipeline would be the end of this peaceful way of living, without mentioning all the disturbance that would occur in the community itself : massive truck passing by, very noisy and creating clouds of dust behind them polluting water tanks (it was exactly what already happened with Sunzia), air pollution due to leak, and danger of leak in the infrastructure near by...And my main concern: the water supply. Water is the most scarce resource in the Southwest, and our small rivers and seasonal washes are what sustain life throughout the region. AI data centers and other facilities use massive quantities of water and energy throughout their lifecycle, while we already don’t always have enough for the people living in rural areas. How could this pipeline project assure that the San Pedro River will be protected and stay healthy? Also, creating new blank space for the construction of the pipeline will be a real threat to cultural landscapes which are non-renewable. It also brings the question of the land owner : if the path of the pipeline is on their land, or in SJ land, how are we supposed to do with the livestock management? Will we lose a part of our land, accessible only for the pipeline sake? What we already know is that constructing such a huge infrastructure means creating additional roads for the maintenance of the pipeline, which creates more paths in remote areas, where unwelcome people travel and vandalise the protected desert and the community shared places. Inevitably, creating this pipeline also means opening the door to other infrastructure such as power plants, AI data centers and other facilities powered by the gas. All of this would sign the end of the wildlife as it has been protected for so long and can not be replaced. This is why I write to you today, to ask you to reconsider the durability of this project on another path, setting aside the cost-effectiveness of a straight route through the desert to take into account the need to preserve this area, its inhabitants and its story. We cannot allow corporations to sacrifice these places in order to generate short-term profits.

      Original en FERC · 20260804-5006 ↗
    2. I am concerned about the effect this pipeline will have on the Lower San Pedro River habitat in Southern Arizona. That desert riparian ecosystem is one of the most important riparian areas in the Southwestern United States. The … Leer todo

      I am concerned about the effect this pipeline will have on the Lower San Pedro River habitat in Southern Arizona. That desert riparian ecosystem is one of the most important riparian areas in the Southwestern United States. The construction activities and the underground pipeline itself will have negative effects on the important water resources in the Lower San Pedro River riparian region. The river’s surface water and groundwater are connected. Injury to the surface and subsurface flow of the river in one place will injure the entire river system. The construction activities and the pipeline will have negative impacts on the natural vegetation, including the mesquite bosques and stands of cottonwoods so important to the birds that migrate through the area and the birds and other mammals that live there year-round. The mesquite and cottonwood riparian zone are part of the critical habitat for endangered species including the yellow-billed cuckoo and the southwest willow flycatcher.

      Original en FERC · 20260804-5004 ↗
    3. RE: PF26-9-000 To Whom It May Concern: We are against the building of the Desert Southwest Expansion Project. We reside in Oracle, Az., a rural, unincorporated community in southern AZ. We moved here 21 years ago because of health … Leer todo

      RE: PF26-9-000 To Whom It May Concern: We are against the building of the Desert Southwest Expansion Project. We reside in Oracle, Az., a rural, unincorporated community in southern AZ. We moved here 21 years ago because of health reasons. We selected Oracle for the quietness, the closeness to nature, less pollution and a much cooler climate than the overbuilt urban communities. This proposed pipeline will affect each of the reasons we moved here for our well-being. Oracle is a "Dark Sky" designated site, surrounded by National Forest, BLM and an AZ State Park which are inhabited by wildlife and used for recreation. Bringing in a massive pipeline of this size will negatively affect the lifestyle of residents, visitors and wildlife and negatively affect the local economy. Per studies we have read, methane emissions from a pipeline, like this, will create pollution which will negatively affect the resident's well-being. As a designated National Firewise Community, we advocate for safe building and maintained vegetation to reduce wildfire. The potential risk of a pipeline includes fire, explosions, and an increase in property insurance or even loss of insurance due to these risks. Also, the added risk of water consumption by this project. The BLM just released an outline for water management of the Colorado River due to overuse because of drought conditions. Under this proposal Arizona is to have cuts up to 16% to 20% to its water allotment. If AZ is to endure cuts, how can a pipeline project be justified? We cannot envision any positive justifications for this project and recommend that it be dismissed. Respectfully,

      Original en FERC · 20260804-5003 ↗
    4. I urge the Federal Energy Regulatory Commission to deny approval of the Desert Southwest Expansion Project (PF26-9-000). This project would expand fossil fuel infrastructure at a time when our region should be investing in cleaner, more … Leer todo

      I urge the Federal Energy Regulatory Commission to deny approval of the Desert Southwest Expansion Project (PF26-9-000). This project would expand fossil fuel infrastructure at a time when our region should be investing in cleaner, more resilient, and more affordable energy resources. Rather than locking Arizona into decades of additional natural gas dependence, we should prioritize renewable energy, energy storage, and efficiency measures that better serve the public interest while reducing environmental impacts. The primary justification for this project appears to be increased demand from large industrial customers, including AI and cloud computing data centers. Arizona does not need to subsidize another wave of energy-intensive data center development. Data centers require enormous amounts of electricity - sometimes exceeding the demand of large cities - and significant quantities of water for cooling. In a state already facing extreme heat, prolonged drought, and declining water supplies, expanding infrastructure to support additional data centers is a poor public policy choice. Furthermore, the rapid expansion of AI infrastructure has all the characteristics of an economic bubble, while many proposed facilities have yet to demonstrate commensurate long-term public benefits. Arizona residents are already struggling with rising utility bills. Utility costs have increased by approximately 13 percent over the past 18 months. Residential ratepayers should not bear the financial burden of building infrastructure that primarily benefits large corporate customers. FERC should carefully evaluate who ultimately pays for this project and ensure that ordinary households are not subsidizing private profits. The project also poses unacceptable environmental risks. Natural gas pipelines are not fail-safe. Pipeline failures continue to occur across the United States, causing explosions, fires, injuries, fatalities, and environmental contamination. For example, the 2010 San Bruno, California pipeline explosion killed eight people, destroyed dozens of homes, and devastated an entire neighborhood. More recently, the 2022 Keystone Pipeline rupture in Kansas released roughly 14,000 barrels of crude oil into nearby waterways and surrounding land, requiring an extensive environmental cleanup. These incidents demonstrate that major pipeline failures are not merely hypothetical—they are recurring events with serious consequences. Beyond the risk of accidents, construction and operation of the project threaten sensitive habitats and wildlife in southern Arizona. The project could adversely affect endemic and threatened species, including the Gila chub, spikedace, and the Mexican spotted owl. These species already face significant pressures from habitat loss, climate change, and water scarcity. Additional fragmentation and disturbance should not be authorized without compelling evidence that impacts can be avoided. The project also raises serious concerns regarding property rights and community engagement. Pipeline companies may rely on eminent domain to acquire private property for construction, placing an unfair burden on landowners. Meaningful consultation with landowners must occur before major infrastructure decisions are made - especially where Tribal lands, cultural resources, and community interests may be affected. For all of these reasons, I urge FERC to deny approval of the Desert Southwest Expansion Project (PF26-9-000). Expanding natural gas infrastructure is inconsistent with the nation's long-term energy, environmental, and economic interests. The Commission should instead encourage investments that reduce costs for consumers, protect Arizona's unique ecosystems, respect the rights of affected communities and Tribal Nations, and accelerate the transition to cleaner and more sustainable sources of energy.

      Original en FERC · 20260804-5002 ↗
    5. I am writing to share my concerns about the proposed route of the Desert Southwest Pipeline through southern Arizona. I am a co-founder and Sr. Program Director with Watershed Management Group, a not-for-profit organization based in Tucson, … Leer todo

      I am writing to share my concerns about the proposed route of the Desert Southwest Pipeline through southern Arizona. I am a co-founder and Sr. Program Director with Watershed Management Group, a not-for-profit organization based in Tucson, Arizona. Our organization for over 20 years has collaborated with agencies, organizations, and local landowners to preserve and restore the San Pedro River, tributaries, and landscape. We conduct annual beaver surveys with community scientists and actively enhance habitat to facilitate beaver restoration as a keystone species throughout this region. This Pipeline will harm areas we have collaboratively worked with partners to actively protect and enhance. The lower San Pedro River and tributaries support a Global Important Bird Area and significant migration route including for Threatened and Endangered Species. The proposed route of the Desert Southwest Pipeline will critically destroy some of the last remaining riparian habitat of southern Arizona. We are in the midst of an ecological crisis as our region is grappling with both a 30-year drought and a 2-year short-term intense drought which has reduced groundwater supported riparian habitat and the ability for wildlife to connect to habitat along our rivers and creeks. In addition, farmers, ranchers, and rural communities rely on this shared water resource as we work collaboratively to protect and restore. In addition to the ecological significance of areas which will be impacted by the pipeline, the river and landscape is culturally significant to the O’odham, Sobaipuri, Apache, and other Tribes. Cultural sites will be negatively impacted by construction and maintenance of the pipeline. Thank you for considering my comments.

      Original en FERC · 20260804-5001 ↗
    6. To the Federal Energy Regulatory Commission, I urge you to reject the Desert Southwest Pipeline or, at the very least, require a comprehensive environmental review that fully considers less destructive alternatives, including routing this … Leer todo

      To the Federal Energy Regulatory Commission, I urge you to reject the Desert Southwest Pipeline or, at the very least, require a comprehensive environmental review that fully considers less destructive alternatives, including routing this project along existing disturbed corridors such as I-10. I was raised in Arizona and know the beauty of this remarkable landscape. My father was an immigrant who taught me that ecosystems are places to be respected, not conquered. He taught me to notice the quiet strength of ants carrying impossible burdens, to admire old trees, and to understand that every living thing has a role in the health of the land. Those lessons have stayed with me my entire life. The Sonoran Desert teaches the same lesson. People who have never lived here often mistake the desert for emptiness. It isn't. It is one of the most remarkable ecosystems in North America. Every mesquite, every saguaro, every wash, every cottonwood along the San Pedro River is part of a web of life that has adapted over thousands of years to survive in one of the harshest environments on Earth. That resilience deserves our respect—not another industrial scar carved across it. The Lower San Pedro watershed is one of the last intact desert river systems in the Southwest. It supports endangered species, migratory birds, and cultural landscapes that have mattered to Indigenous peoples for centuries. Construction of this pipeline would remove native vegetation, fragment wildlife habitat, threaten archaeological and cultural resources, and introduce new risks from erosion, flooding, wildfire, and high-pressure methane infrastructure into an ecosystem that cannot simply be rebuilt once it has been disturbed. These are not hypothetical concerns—they are precisely the issues that deserve careful consideration during FERC's environmental review. I am especially troubled that this project appears intended to support the enormous energy demands of hyperscale data centers. We are being asked to sacrifice living ecosystems so that corporations can continue expanding energy-intensive infrastructure. That is not a fair trade. The environmental costs will be carried by Arizona's landscapes and communities, while the economic benefits flow elsewhere. As someone who has spent years working in environmental education and sustainability, I have learned that nature works on a different timeline than we do. A saguaro may take seventy-five years just to grow its first arm. Cottonwoods mature over generations. Desert soils, river corridors, and wildlife habitat develop over centuries. Yet we can destroy those systems in a matter of weeks with heavy equipment. That imbalance should give us pause. Once these places are fragmented, we cannot simply engineer them back into existence. The proposed route also raises important local concerns. Residents have expressed worries about water demand in an already water-limited region, compressor noise, habitat disruption, safety risks, and unnecessary routing through sensitive areas when less damaging alternatives may exist. These concerns deserve meaningful consideration before irreversible decisions are made. Arizona is extraordinary because there are still places where you can hear nothing but wind moving through the mesquite, insects working beneath your feet, and birds following one of North America's great migratory corridors. Those places are becoming increasingly rare. They are part of our natural heritage, and once they are gone, they are gone for everyone. Progress should not be measured by how quickly we can industrialize the landscape. It should be measured by whether we leave future generations with healthy rivers, thriving wildlife, and ecosystems that are still capable of sustaining life. I respectfully ask FERC to fully evaluate the cumulative impacts of this proposal, meaningfully consult with affected Tribal Nations and local communities, seriously consider less destructive routing alternatives, and reject any route that unnecessarily harms one of the Southwest's greatest ecological and cultural treasures. Thank you for your time and consideration.

      Original en FERC · 20260804-5000 ↗
    7. Presentado en papel o escaneado; ábralo en FERC.

      Original en FERC · 20260804-0003 ↗
  40. Comentarios del público

    Comentario de una persona del público

    1. Please ensure during construction that noise, traffics, dust, light pollution, and environmental disruption or destruction are kept to a minimum. Concerning Compressor location and impact, same concerns as above as well as natural gas … Leer todo

      Please ensure during construction that noise, traffics, dust, light pollution, and environmental disruption or destruction are kept to a minimum. Concerning Compressor location and impact, same concerns as above as well as natural gas spills avoided. Placement of Compressor as far from habitants as possible. My preference is no facility at all. Thank you

      Original en FERC · 20260803-5205 ↗
  41. Insignia Estates LLC

    Comments of Insignia Estates LLC in response to FERC's 07/06/2026 Notice of Scoping Period on Environmental Issues et al. re the Planned Desert Southwest Expansion Project under PF26-9.

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    UNITED STATES OF AMERICA FEDERAL ENERGY REGULATORY COMMISSION Transwestern Pipeline Company, LLC Desert Southwest Expansion Project Docket No. PF26-9-000 COMMENTS OF INSIGNIA ESTATES LLC Insignia Estates LLC submits these comments in response to the Commission’s July 6, 2026 Notice of Scoping Period concerning Transwestern Pipeline Company, LLC’s proposed Desert Southwest Expansion Project. Insignia Estates owns approximately 538 acres consisting of six parcels1 under common ownership in unincorporated Maricopa County near Old U.S. Highway 80 and West Patterson Road. The property is governed by an approved master-planned development framework, including Maricopa County Comprehensive Plan Amendment CPA2015007 and approved PAD/RUPD zoning, and is approved for a substantial mixed-use community consisting of up to 2,091 residential units together with associated commercial, educational, recreational, open-space, transportation, and infrastructure uses. Select site schematics from the approved master-planned development framework are included in Exhibit A. The property is also being evaluated for other large-scale development opportunities. Its eastern portion is important to existing and future ingress and egress, internal circulation, utility routing, drainage, and other development infrastructure. Support for the project and interest in continued coordination Insignia Estates is generally supportive of the proposed expansion and recognizes that additional naturalgas infrastructure in this area may provide regional benefits and potential infrastructure opportunities. The owner is interested in evaluating possible future access to the proposed gas infrastructure for a data center or other large-scale energy user, subject to appropriate routing, access arrangements, engineering, regulatory, and commercial terms. The owner wishes to remain actively engaged as the route and related facilities are refined. Potential opportunities may exist to coordinate the proposed alignment with a shared or parallel infrastructure corridor accommodating gas, electric facilities, fiber, access, or other compatible utility uses. Of particular importance is the Arizona state land immediately north of the Insignia property. The owner understands that this land is anticipated to become subject to an APEX lease following the currently scheduled state-land auction in August 2026 and that the proposed lateral may also require an easement or other authorization across that area. Insignia requests early coordination with Transwestern, the Arizona State Land Department, and any future lessee to preserve opportunities for compatible infrastructure interconnections and to avoid a pipeline easement or lease configuration that would unnecessarily foreclose a shared, parallel, or otherwise coordinated corridor serving the Insignia property. Insignia does not oppose the project. Its objective is to ensure that the route, easements, construction areas, and potential future access arrangements are developed collaboratively while preserving the property’s access, development flexibility, and infrastructure optionality. Insignia recognizes that the Commission does not grant Arizona state-land rights, but requests that the environmental review and landowner-coordination process recognize this corridor issue and preserve a practical opportunity for future coordination. Prior communications, preliminary mapping, and requested survey access Before issuance of the Commission’s scoping notice, Doyle Land Services, acting as contractor for Energy Transfer LP in connection with the Transwestern project, communicated with the owner’s agent regarding the potential alignment near Insignia Estates. Doyle provided preliminary maps and discussed mapping schematics at the project open house. Insignia understands that the route remains under development. The information provided to date has necessarily been approximate, and uncertainty remains regarding the precise relationship of the proposed facilities, construction areas, and access requirements to the Insignia property. 1 Maricopa County Assessor Parcel Numbers 401-62-020A, 401-62-018C, 401-62-019C, 401-62-019D, 401-62-017H, and 401-62017J. Doyle also requested survey access to two eastern Insignia parcels, APNs 401-62-020A and 401-62-018C, and emphasized the urgency of obtaining access. Insignia worked constructively to accommodate the stated survey needs and provided a signed, limited survey-access agreement. Because Doyle’s original document was structured as a unilateral permit, Insignia revised it into a mutual agreement requiring Transwestern’s countersignature. Doyle subsequently returned a version that largely reverted to the original unilateral permit form, after which Insignia returned a further redline. Following a later inquiry from the owner’s agent, Doyle advised that Energy Transfer presently believes it can conduct the necessary survey activities without accessing the Insignia property. Accordingly, no survey-access agreement was completed and no property access is presently being requested. Insignia’s participation in those discussions should not be understood as agreement with any proposed route or as consent to any easement, temporary workspace, construction access, or other use of the property. Issues for the Commission’s environmental review Insignia Estates respectfully requests that the Commission and its environmental staff address the following matters: 1. Relationship of the proposed route to the property. The environmental review should clearly identify whether the proposed pipeline, study corridor, permanent right-of-way, temporary construction workspace, access routes, or related facilities would cross, adjoin, or otherwise affect the Insignia property. Updated and sufficiently detailed mapping should be provided as the route is refined. 2. Effects on access and future development. The review should evaluate potential effects on ingress and egress, internal …

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  42. Comentarios del público

    8 comentarios de personas del público

    1. Reroute the pipeline to avoid the [place] Preserve and Cooperative Management Area and the Middle and Lower San Pedro River Valley. Fully study the damage to water, wildlife, and vegetation if they don’t.

      Original en FERC · 20260803-5041 ↗
    2. There is no valid reason to put the pipeline through habitat necessary for endangered species to thrive.

      Original en FERC · 20260803-5040 ↗
    3. Dear Commissioners, As a Texas resident, I respectfully request that the Federal Energy Regulatory Commission (FERC) thoroughly evaluate critical environmental and community impacts during its review of Docket No. PF26-9-000 (Desert … Leer todo

      Dear Commissioners, As a Texas resident, I respectfully request that the Federal Energy Regulatory Commission (FERC) thoroughly evaluate critical environmental and community impacts during its review of Docket No. PF26-9-000 (Desert Southwest Pipeline). As you draft the Environmental Impact Statement, please consider the following vulnerable areas along the proposed route: • Otero Mesa & West Texas Salt Flats: This route threatens delicate Chihuahuan Desert ecosystems, sacred tribal lands, vital aquifers, and sensitive species such as the Salt Playa Fairy Shrimp. • Chaparral, New Mexico: As an overburdened environmental justice community already in ozone non-attainment, Chaparral cannot absorb additional air quality degradation or public health risks from the proposed 48” pipeline, Red Chile lateral, and compressor station. • Water Resources & HDD Risks: Horizontal Directional Drilling poses documented risks of drilling fluid spills into vital regional water sources, including the Rio Grande, Pecos, and San Pedro rivers. • Lower San Pedro Watershed: This critical riparian corridor supports hundreds of wildlife species, and the associated infrastructure threatens local water resources and sites sacred to the San Carlos Apache and Tohono O’odham tribes. I ask that FERC prioritize the protection of our scarce water, natural resources, and local communities as you conduct your review. Thank you for your time, leadership, and careful consideration of these impacts.

      Original en FERC · 20260803-5038 ↗
    4. Do not build the gas pipeline! It will strain water supplies that are already suffering. It will harm wildlife species that are endangered. It is dangerous because of the explosions that often happen in pipeline accidents. The construction … Leer todo

      Do not build the gas pipeline! It will strain water supplies that are already suffering. It will harm wildlife species that are endangered. It is dangerous because of the explosions that often happen in pipeline accidents. The construction of the gas line also harms the land of native tribes and communities. This pipe poses a higher risk to human and animal health in relation to the threat or gas leaks. Arizona and the other Southwestern states this gas pipeline will be in are already the driest states in the US. The pipeline will only make our climates worse making it impossible for humans and animals to thrive.

      Original en FERC · 20260803-5036 ↗
    5. I write out of concern for the Lower San Pedro River habitat in southern Arizona. This valley and its riparian habitats will be adversely affected by the proposed pipeline. The valley serves as a wildlife corridor to surrounding ranges in … Leer todo

      I write out of concern for the Lower San Pedro River habitat in southern Arizona. This valley and its riparian habitats will be adversely affected by the proposed pipeline. The valley serves as a wildlife corridor to surrounding ranges in Arizona’s Sky Islands. Both construction effects and those of the permanent easement will adversely affect migration of mammals. The vast mesquite bosques and stands of cottonwoods will be affected by both construction and the easement, causing damage to critical habitats for endangered species such as the southwestern willow flycatcher and the yellow-billed cuckoo. Both construction activities and the underground pipeline are a serious threat to water resources, including the surface and subsurface flow of the river.

      Original en FERC · 20260803-5034 ↗
    6. I vehemently reject any pipe line from texas to Phoenix that is going to supply gas for data center power. These pipelines leak and adversely affect the health of the communities and environment they run through. Gas leaks are inevitable … Leer todo

      I vehemently reject any pipe line from texas to Phoenix that is going to supply gas for data center power. These pipelines leak and adversely affect the health of the communities and environment they run through. Gas leaks are inevitable and the people of Bowie, Wilcox, San Manuel, Coolidge, and Oracle deserve better. Cancel the pipeline. We don’t want the data centers or the damage the energy required would bring. PF26-9-000

      Original en FERC · 20260803-5033 ↗
    7. The San Pedro River is the last remaining major natural and intact river ecosystem in southern Arizona. It is a beautiful treasure of biodiversity that is already under threat from climate crisis, fast dwindling water resources, mining, and … Leer todo

      The San Pedro River is the last remaining major natural and intact river ecosystem in southern Arizona. It is a beautiful treasure of biodiversity that is already under threat from climate crisis, fast dwindling water resources, mining, and overdevelopment. The Energy Transfer pipeline and the proposed Faraday copper mine will destroy this area, one of my favorite places on earth. It will also damage other parts of the West. Rampant pollution (from roads, construction and also including from floods), bright lights, overuse of scarce water will be inevitable. Along with seriously harming wildlife and their habitat, they will threaten valuable archaeological, historical and cultural sites of many Native American tribes. This will no longer be a jewel of biodiversity and a destination spot for people, who do contribute to the area economy! I have been visiting, enjoying and birding this area for more than thirty years, and have observed the habitat degradation from overuse of water and ever increasing development. I see fewer birds and plants every time I go. Bird migration will be upset by increased lighting and habitat loss, and birds and other animals will no longer be able to enjoy this space and rest here. Plants will be lost. It will no longer be a paradise for animals or people! The ever-growing use of water by increasing border troops and staff, as well as Fort Huachuca should be considered. Even today Arizona faces deep cuts in our water use, with the Colorado River Basin proposals. Last summer I was deeply distressed to see only intermittent puddles where there used to be a free flowing river by the San Pedro House. Before some recent monsoons, the river was declared the driest it had been in decades. We have been in a serious drought for decades too! The latest recent challenges to our area also include an RV park approved right next to the SPNCA, as well as other mines in the area. These projects will add to the destruction. I see fewer birds, wildlife, and even plants every time I go. Can we not protect this peaceful and unique treasure and all the other lands that will be harmed by this pipeline and mine? Can we not urge conservation of resources, rather than destroying the beautiful lands of our country? Please reconsider and save this beautiful area before its too late. Please look at the big picture. Extinction is forever!! If somehow these projects do somehow proceed, please consult the area wildlife organizations, the Friends of the San Pedro, Tucson Bird Alliance, and groups like the Center for Biological Diversity to minimize the terrible damage that will accompany them. Thank you for your consideration. Please help and deny these projects!

      Original en FERC · 20260803-5032 ↗
    8. Your honor, Do not approve Energy Transfer's Desert Southwest Pipeline. This pipeline will disrupt ecosystems that our region is reliant on. This pipeline will require harmful practices like fracking. This pipeline will not bring Arizonans … Leer todo

      Your honor, Do not approve Energy Transfer's Desert Southwest Pipeline. This pipeline will disrupt ecosystems that our region is reliant on. This pipeline will require harmful practices like fracking. This pipeline will not bring Arizonans any benefit - it will only bring profit to the few. Our environmental situation is dire. States that rely on Colorado River water are being asked to reduce usage by 20%. 40 million people rely on that water. Approving this Pipeline to power Data Centers that require extremely high water consumption is a betrayal of the people of Arizona. Further, this project will destroy habitat of endangered species and threaten land that has high cultural value. I know the word "Sacred" gets used a lot these days, and so I want to remind anyone reading this what it means. Sacred: entitled to reverence and respect. Why is it that, what is sacred to humanity can be bought and sold by those who would destroy humanity? Data centers do not have the prosperity or happiness of people in mind. Lastly, environmentally, we as Arizonans can be leaders in the struggle against rising temperatures and changing climates. Phoenix just experienced its highest overnight low temperature - EVER. Yet, countries like Costa Rica, Italy, Denmark, and India have made huge efforts to reverse the impact of industrialization with extreme success. Why do we, the shining beacon on the hill, not aspire to be leaders in this way? Why do we value data instead of food? Why do WE not aspire to prioritize the things humanity needs to survive - WATER and food. I do not want a data center in my state. I do not want another pipeline. I do not want to watch as people die in summer heat because they couldn't afford to cool their home. This project does not have humanity's interests at heart. It has one panel of investors' interests at heart. Do not approve this.

      Original en FERC · 20260803-5027 ↗

julio de 2026

  1. Comentarios del público

    2 comentarios de personas del público

    1. I am commenting in strong opposition to the Transwestern Pipeline Expansion project. As a lifelong resident of the Southwest, I have firsthand awareness of the water scarcity issues our region faces. Arizona's water tables are receding and … Leer todo

      I am commenting in strong opposition to the Transwestern Pipeline Expansion project. As a lifelong resident of the Southwest, I have firsthand awareness of the water scarcity issues our region faces. Arizona's water tables are receding and groundwater supplies are becoming increasingly important to steward with care and and consideration for the needs of future generations. I understand that the proposed project requires drilling underneath the Rio Grande, Pecos, San Pedro and Gila Rivers. The risk of leaks in and along these invaluable watersheds is not worth the ultimately short-term profits that the project would generate. Taking such risks in a water-insecure region like ours would be utterly irresponsible. I also understand that the gas transported by this pipeline would be used to power AI data centers across the region. The community and environmental impacts of data centers are still being revealed, but it is well-known that these facilities consume large amounts of water in their operations, which would further strain the region's limited water supplies. As someone who deeply values public lands and the biodiversity that makes the Southwest a beautiful and enjoyable place to live, I am also concerned that this project is planned to span remote and sensitive wilderness areas such as the Chihuahua Desert - one of the most biodiverse deserts on earth. Finally, I am very concerned that the project is estimated to emit 56 million metric tons of CO2 each year. This represents a massive step backwards for the long-term sustainability and resiliency of our country's energy sourcing and will ultimately only worsen the climate-related challenges faced by our region, including severe drought, rising utility bills, inhospitable temperatures, and food insecurity. I believe that risking the future and health of the American people for the short-term profit of gas and data center industries is both irresponsible and immoral. Thank you for considering my concerns regarding this project.

      Original en FERC · 20260730-5165 ↗
    2. There are an exceptionally long list of reasons why this proposal is absolutely ridiculous. Number one being that This project fundamentally disregards the desecration of the land they propose to build across. There are many Native holy … Leer todo

      There are an exceptionally long list of reasons why this proposal is absolutely ridiculous. Number one being that This project fundamentally disregards the desecration of the land they propose to build across. There are many Native holy sites and rare biomes this pipeline would cut through. The pipeline itself would produce excessive emissions of upwards 15 coal plants in a year could produce. In Arizona specifically, we're already well exceeding the limits of what should be expelled due to the aggressive increase we're experiencing due to the climate change from such wonton pollutive projects. Furthermore, the pipelines whole premise is to power Data centers, data centers that are poorly designed to leverage the cheapest method of cooling, Water. In a state that is so severely struggling with water rights and drought, this is absolutely a huge mistake to provide means to enabling further strain on our extremely limited resource. Even from a financial standpoint, long term it will simply not be a good investment as we're already careening towards a very quick end to livable conditions for the population as it stands regardless of its hyper growth rate recently gaining momentum. This is a poor investment to power a service that will clearly fail within a decade. One million percent, do not proceed with this project, its a loose loose in all scenarios.

      Original en FERC · 20260730-5102 ↗
  2. Texas Department of Transportation

    Comments of the Texas Department of Transportation concerning potential environmental and land use issues etc. for the Desert Southwest Expansion Project under PF26-9.

    Leer el comentario

    , Texas Department of Transportation July 22, 2026 3901 E Highway 80 I Odessa, Texas 79761 [phone] txdot.gov ORIGINAL FILED 1024 JUL 30 30 r AL ENERGY (7:0MMISSI0N Debbie-Anne A. Reese Secretary Federal Energy Regulatory Commission 888 First Street NE Room 1A Washington, DC 20426 Re: Federal Energy Regulatory Commission (FERC) Desert Southwest Expansion Project, Docket No. PF26-9-000, by Transwestern Pipeline Company, LLC (Transwestern). To Whom It May Concern: The Odessa District of the Texas Department of Transportation (TxDOT) has completed its review of the proposed project information dated July 22, 2026, concerning the above pipeline project. Due to lack of specific project information, the Odessa District can only speculate as to the additional potential environmental and land use issues and impacts within the broad corridor shown and, as such, no additional comments are offered. However, FERC and Transwestern should be advised of potential required coordination with other state, federal and local entities. FERC and Transwestern should also be made aware that utility installation requests are required for accommodation of utility facilities on the state highway right of way. All requests must be submitted through the Right of Way Utility and Leasing Information System (RULIS) found at https://www.txdot.gov/business/right-of-way/rulis.html Additionally, driveway/access permits are required for access connections to the state highway system. TxDOT Form 1058 - Permit to Construct Access Driveway Facilities on Highway Right of Way, coupled with the Commercial and Industrial Driveway Access Request Form shall be completed and submitted to TxDOT for consideration of each proposed access/driveway location. Thank you for affording TxDOT the opportunity to comment on this proposed project. If you have any questions or require further assistance, please contact me at [phone] or gabriel.ramireztxdot.gov. Sincerely, LSigned by: AO Gabriel Ramirez, P.E. Director of Transportation Planning and Development Odessa District Connecting You with Texas An Equal Opportunity Employer 12764B3202A84AC

  3. Comentarios del público

    Comentario de una persona del público

    1. Federal Energy Regulatory Commission [address] NE Washington, D.C. 20426 29 July 2026 RE: Transwestern Pipeline, LLC Docket No. PF26-9-000 To Whom It May Concern, The Pueblo de Cochiti acknowledges receipt of the Federal Energy … Leer todo

      Federal Energy Regulatory Commission [address] NE Washington, D.C. 20426 29 July 2026 RE: Transwestern Pipeline, LLC Docket No. PF26-9-000 To Whom It May Concern, The Pueblo de Cochiti acknowledges receipt of the Federal Energy Regulatory Commission’s (FERC) Notice of Scoping Period Requesting Comments on Environmental Issues for the Planned Desert Southwest Expansion Project and Notice of Public Scoping Sessions dated 6 July 2026. The Pueblo has reviewed the proposed undertaking and has determined that it has potential to effect historic properties of cultural and historical significance. Therefore, the Pueblo formally requests the initiation of government-to-government consultation on this matter. We ask that an initial meeting be scheduled to discuss the project in detail and to establish a government-to-government consultation framework for this undertaking which respects the Pueblo’s sovereign status, values, and interests. Please contact the Cochiti Tribal Historic Preservation Officer at [email] to coordinate the next steps in this consultation process. The Pueblo looks forward to working with you to ensure that Cochiti’s cultural heritage is appropriately considered in this process. Please retain the Pueblo de Cochiti on your contact list for future consultation requests. Sincerely,

      Original en FERC · 20260729-5056 ↗
  4. Comentarios del público

    2 comentarios de personas del público

    1. Presentado en papel o escaneado; ábralo en FERC.

      Original en FERC · 20260728-5082 ↗
    2. Dear Members of the Federal Energy Regulatory Commission: I am writing to express my strong support for the approval and construction of the proposed Desert Southwest Expansion Project. As a member of the International Union of Operating … Leer todo

      Dear Members of the Federal Energy Regulatory Commission: I am writing to express my strong support for the approval and construction of the proposed Desert Southwest Expansion Project. As a member of the International Union of Operating Engineers (IUOE), I believe this project represents a vital investment in our region’s energy infrastructure and economic future, particularly because of its commitment to utilizing highly skilled local union labor. A major strength of the Desert Southwest Expansion Project is its partnership with skilled labor organizations, including the IUOE. Projects of this scale demand the highest level of precision, and by relying on IUOE heavy equipment operators and mechanics, the project will help ensure that this infrastructure is built to the highest standards of quality, safety, and longevity. The involvement of the IUOE also reflects a strong commitment to safety and environmental stewardship. IUOE members undergo rigorous, industry-leading training at state-of-the-art facilities, helping ensure that excavators, dozers, side booms, and other equipment are operated safely and efficiently on-site. This specialized expertise helps minimize environmental risks and supports strict compliance with regulatory safety standards. Furthermore, this project would provide an essential economic boost to working families. By utilizing IUOE members, the project would create high-quality, family-sustaining jobs with fair wages, healthcare, and retirement benefits. It would also support the union’s registered apprenticeship programs, offering the next generation of local workers a pathway into rewarding careers in the skilled trades. Pipelines remain one of the safest and most efficient methods to transport the energy resources our economy relies upon. Building this pipeline with a highly trained workforce is a win for energy security, the economy, and community safety. For these reasons, I respectfully urge the Commission to approve the necessary permits and move forward with the Desert Southwest Expansion Project. Thank you for your time, consideration, and dedication to supporting reliable energy infrastructure and the skilled local workforce that helps build it. Sincerely,

      Original en FERC · 20260728-5026 ↗
  5. Comentarios del público

    2 comentarios de personas del público

    1. To whom it may concern: I live in Pinal County and this pipeline would basically be in my back yard. Would you like it in your back yard? My concern with land, water, air, and noise pollution. We live in a rural area that is currently very … Leer todo

      To whom it may concern: I live in Pinal County and this pipeline would basically be in my back yard. Would you like it in your back yard? My concern with land, water, air, and noise pollution. We live in a rural area that is currently very nice. However, big industrial companies are attempting to put in Gas fired power plants, solar farms, and data centers. We live out here to get away from the crazy hustle that city life brings. You can actually see the stars at night and amazing animals that come through our yards. These improvements would jeopardize our air quality, take away state land that protects animals on the verge of extinction, completely deplete our water supply; due to the fact many of us are on wells, and create unnecessary noise. The fact that there is no way of installing and operating the pipeline in a safe manner we oppose these so-called improvements. Please consider how this will affect many people's quality of life. Can you live without water? Please reconsider

      Original en FERC · 20260727-5089 ↗
    2. I oppose the Desert Southwest Expansion Project and pipeline routing to be constructed and operated by Transwestern Pipeline Company, LLC (Transwestern) in Texas, New Mexico and Arizona (DSWEP) for the following reasons: • The burning and … Leer todo

      I oppose the Desert Southwest Expansion Project and pipeline routing to be constructed and operated by Transwestern Pipeline Company, LLC (Transwestern) in Texas, New Mexico and Arizona (DSWEP) for the following reasons: • The burning and release of methane gas contributes to Climate Change. • New and future energy sources for Arizona should be green and NOT dependent on fossil fuels and/or water consumption. • The San Pedro River is a significant natural resource containing many unique, rare and endangered plant and animal species. It is the last free flowing river in the Southwest. • The San Pedro River valley does not have the water resources to support further industrialization, additional settlement and continued over drafting of its water. (Re: 30 year drought, insufficient water resources to replenish its aquifers and surface water). • The DSWEP Pipeline construction and presence will damage the health and well-being of human and natural communities, Northeast Oracle (additional Compressor Station), Redfield Canyon Wilderness and Oracle State Park. • The DSWEP Pipeline construction will damage significant archeological sites and demean the spiritual sites and values of indigenous people. • The purpose of DSWEP Pipeline is to industrialize and promote settlement in the San Pedro Valley by including 10 inch lateral lines they are requesting and their relationship with Arizona G&T Cooperative (Energy generation facility). More people settling in Arizona is not sustainable. • The Colorado River Water Allotment Settlement will place restrictions on future development and water usage in Arizona

      Original en FERC · 20260727-5043 ↗
  6. Office of Energy Projects

    FERC invitó a 29 tribus a consultar sobre el proyecto

    Lista de tribus

    El gasoducto va de la Cuenca Pérmica a Arizona, así que la lista incluye tribus de toda la ruta.

  7. Comentarios del público

    Comentario de una persona del público

    1. The Church of St. Clement in El Paso, Texas has property in Luna County and is in favor of the Transwestern Pipeline Company, LLC's planned Desert Southwest Expansion Project.

      Original en FERC · 20260721-5254 ↗
  8. Comentarios del público

    Comentario de una persona del público

    1. Presentado en papel o escaneado; ábralo en FERC.

      Original en FERC · 20260720-0001 ↗
  9. Comentarios del público

    Comentario de una persona del público

    1. We are landowners in Coolidge, Arizona that will be impacted by the proposed Transwestern gas pipeline. One general comment we have is that this pipeline ought to be located within existing Rights-of-Way to minimize the impact of cutting … Leer todo

      We are landowners in Coolidge, Arizona that will be impacted by the proposed Transwestern gas pipeline. One general comment we have is that this pipeline ought to be located within existing Rights-of-Way to minimize the impact of cutting through the middle of private landowners’ property. Specifically, as it relates to the portion of this proposed pipeline as it moves north through Coolidge, we would recommend locating the pipeline within or adjacent to the existing Union Pacific Railroad right-of-way. Those tracks run roughly parallel to the proposed Transwestern gas pipeline through Coolidge and are separated (the railroad right-of-way and the proposed gas pipeline route) by less than a mile. By locating the proposed gas line within or adjacent to the railroad right-of-way, you avoid the significant impacts a gas line imposes when it bisects and divides private property. Thank you.

      Original en FERC · 20260717-5119 ↗
  10. Office of Energy Projects

    Memo providing meeting notes of the 07/07/2026 Interagency Meeting between FERC staff, Transwestern Pipeline Company, LLC et al. re the Desert Southwest Expansion Project under PF26-9.

  11. Comentarios del público

    Comentario de una persona del público

    1. The only comment is that as this process moves along that the native plant laws are followed as required by law under ARS Article 3, Chapter 7 (https://www.azleg.gov/arsDetail/?title=3) and by rule Chapter 3, Article 11. (https://apps.azsos.gov/public_services/Title_03/3-03.pdf).

      Original en FERC · 20260715-5080 ↗
  12. Comentarios del público

    3 comentarios de personas del público

    1. To whom it may concern, The Bureau of Reclamation - Phoenix area office (PXAO) requests to be a cooperating agency in the NEPA process for this action. PXAO's area of responsibility includes the Central Arizona Project, which this proposed … Leer todo

      To whom it may concern, The Bureau of Reclamation - Phoenix area office (PXAO) requests to be a cooperating agency in the NEPA process for this action. PXAO's area of responsibility includes the Central Arizona Project, which this proposed pipeline would cross. Therefore Reclamation would have a federal action associated with this proposal. The point of contact at PXAO will be [name] [name], Environmental Manager. He can be contacted via email at [email] or by phone at [number].

      Original en FERC · 20260714-5129 ↗
    2. As landowners in Luna County, NM, we have no objections to any phase of this project. Actually, we encourage more projects like this. Thank You,

      Original en FERC · 20260714-5003 ↗
    3. Debbie-Anne A. Reese, Acting Secretary Federal Energy Regulatory Commission [address], N.E. Washington, DC 20426 RE: Transwestern Pipeline Company, LLC Desert Southwest Expansion Project Docket No. PF26-9-000 Public Scoping Comments … Leer todo

      Debbie-Anne A. Reese, Acting Secretary Federal Energy Regulatory Commission [address], N.E. Washington, DC 20426 RE: Transwestern Pipeline Company, LLC Desert Southwest Expansion Project Docket No. PF26-9-000 Public Scoping Comments Regarding the Deming / Luna County Segment Dear Secretary Reese, I am writing to formally submit my public scoping comments regarding the proposed Desert Southwest Expansion Project (Docket No. PF26-9-000). As an owner of land in Deming, New Mexico that might lie in the path of the prospective pipeline route, I am concerned about the planned installation of this natural gas transmission pipeline and request that the Commission thoroughly evaluate the localized impacts on the community during the National Environmental Policy Act (NEPA) review process. Specifically, I urge FERC to mandate a rigorous assessment of the following issues within the Deming segment: Route Location and Land Disturbance: While the applicant states they intend to utilize existing infrastructure corridors for the majority of the route, the exact path through Deming must be carefully scrutinized. I request that FERC evaluate the proximity of the proposed 48-inch pipeline to residential neighborhoods, local schools, agricultural lands, and public infrastructure to minimize the use of eminent domain and disruptions to private property owners. Water Resource Protection: Luna County relies heavily on critical groundwater basins for municipal and agricultural use. The Environmental Impact Statement (EIS) must thoroughly evaluate how trenching, pipeline installation, and ongoing operations will impact our local aquifers, water table levels, and irrigation networks. Local Economic and Infrastructure Impact: The influx of construction crews will place a temporary strain on local emergency services, roads, and lodging in Deming. FERC should require Transwestern to outline clear mitigation strategies for local traffic disruptions, heavy machinery damage to local roads, and safety coordination with Luna County first responders. PLEASE PROVIDE A DETAILED MAP OF THE PROPOSED PIPELINE ROUTE THROUGH LUNA, COUNTY NM. I OWN A LAND PARCEL ON SAN PABLO ROAD JUST NORTH OF THE FLORIDA MOUNTAINS AND NEED TO KNOW IF THIS AREA WILL BE IMPACTED. Thank you for your time, consideration, and dedication to ensuring that the voices of Deming residents and landowners are fully integrated into this federal review process. Sincerely,

      Original en FERC · 20260714-5002 ↗
  13. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Monthly Progress Report No. 3 for the period of 06/11/2026 to 07/09/2026 re the proposed Desert Southwest Expansion Project under PF26-9.

  14. Comentarios del público

    Comentario de una persona del público

    1. Date: July 7, 2026 Project Name: Desert Southwest Expansion Project DOCKET NO: PF26-9-000 Filing Party: [name] M. [name], Resident & Community Advocate, Hudspeth County, Texas Subject: Formal Scoping Comments Regarding Environmental, … Leer todo

      Date: July 7, 2026 Project Name: Desert Southwest Expansion Project DOCKET NO: PF26-9-000 Filing Party: [name] M. [name], Resident & Community Advocate, Hudspeth County, Texas Subject: Formal Scoping Comments Regarding Environmental, Infrastructure, and Public Safety Gaps in Pre-Filing Disclosures Dear Secretary Reese and Commission Staff, As a long-term resident of Hudspeth County, Texas, and an advocate for public resource transparency in the West Texas region, I am submitting these formal scoping comments regarding the planned Desert Southwest Expansion Project. While I note that FERC staff and Transwestern have initiated bi-weekly technical reviews, a critical analysis of the current pre-filing disclosures reveals several severe omissions regarding localized environmental impacts, public safety burdens, and regional infrastructure stress across the proposed 526.5-mile footprint. I request that the Commission formally compel Transwestern Pipeline Company, LLC to address and expand upon the following critical areas within their upcoming Draft Resource Reports: 1. Finite Aquifer Vulnerability & Localized Hydrostatic Water Sourcing Omission: Current high-level project outlines fail to define the exact geographic sourcing and volume requirements for the millions of gallons of water necessary for hydrostatic testing of a 48-inch-diameter pipeline, dust suppression, and trenching in hyper-arid desert basins. Requirement: Transwestern must be required to provide a localized groundwater impact model specifically for the fragile high-desert water tables along the route, including the Bone Spring-Victorio Peak Aquifer in the Dell Valley. The Commission must demand a project-wide groundwater protection plan that outlines strict containment protocols for drilling fluids and accidental chemical spills over these contiguous subterranean water supplies. 2. Structural Strain on Isolated Rural Emergency Services Omission: The pre-filing documentation glosses over the severe operational burdens placed on remote communities by introducing eight new compressor stations and high-pressure transmission lines through unstaffed, isolated territory. Requirement: The Environmental Impact Statement (EIS) must evaluate the true response capabilities of the small, volunteer fire departments and underfunded Emergency Service Districts (ESDs) along the entire path. Transwestern should be legally bound to provide direct, upfront corporate funding, specialized industrial fire mitigation equipment, and ongoing training to every rural emergency response entity tasked with protecting this infrastructure. 3. Geothermal Activity, Thermal Expansion, and Seismic Hazard Mapping Omission: The current scope lacks a comprehensive geologic assessment regarding how a buried 48-inch highpressure pipeline handles the unique thermal and structural stresses of regional fault lines and geothermal zones. Requirement: The Commission must mandate a dedicated geologic hazard report that maps the intersection of the pipeline route with known West Texas and New Mexico fault lines, shifting desert basins, and areas characterized by high geothermal potential or significant thermal expansion risks. 4. High-Desert Ecosystem Fragmentation & Permaculture-Based Restoration Omission: A 150-foot-wide construction rightof-way will cause severe, irreversible damage to the delicate desert crust and native flora, which generic "re-seeding" checklists cannot repair. Requirement: The removal of deeply rooted, drought-resistant native vegetation (such as mesquite and honey locust) alters local microclimates and triggers catastrophic wind erosion and caliche dust storms. Transwestern must implement a strict, sitespecific permaculture restoration framework designed to rebuild soil biology and stabilize the native landscape post-construction. 5. Mitigation of the Digital Divide in Public Notice Logistics Omission: The complete absence of physical, in-person scoping sessions within the West Texas segment of the route disproportionately disenfranchises rural taxpayers who suffer from poor internet access and limited technical resources. Requirement: To ensure equitable public participation under NEPA, the Commission should require Transwestern to physically mail hard copies of all subsequent environmental documents, draft assessments, and final impact statements directly to local libraries and county clerk offices along the entire pipeline alignment. Thank you for your rigorous oversight and dedication to ensuring that the public convenience and necessity are balanced with absolute transparency and community protection. Respectfully submitted,

      Original en FERC · 20260709-5000 ↗
  15. Secretary of the Commission - FERC

    Notice of Scoping Period Requesting Comments on Environmental Issues for the Planned Desert Southwest Expansion Project, and Notice of Public Scoping Sessions re Transwestern Pipeline Company, LLC under PF26-9.

  16. Office of Energy Projects

    Memo providing meeting notes of 06/16/2026 bi-weekly pre-filing meeting between FERC staff and Transwestern Pipeline Company, LLC re the Desert Southwest Expansion Project under PF26-9.

junio de 2026

  1. Lower San Pedro Watershed Alliance

    Comments of Lower San Pedro Watershed Alliance on the proposed Desert Southwest Expansion Project under PF26-9.

    Leer el comentario

    P.O. Box 544, Mammoth, AZ 85618 [email] | www.lowersanpedro.org [phone] June 26, 2026 Laura V. Swett, Chair Federal Energy Regulatory Commission (FERC) 888 First Street, NE Washington, DC 20426 Lower San Pedro Watershed Alliance Submits Comments on Desert Southwest Expansion Project in Docket # PF26-9-000 (Submitted via FERC eRegister, pre-filing docket) Dear Ms. Swett, The Lower San Pedro Watershed Alliance (LSPWA) based in Mammoth, Arizona, is a 501c3 organization of 250 members with a mission to protect the ecological integrity and cultural heritage of the lower San Pedro River Valley. Given our mandate, this letter is to call to your attention potential detrimental ecological and Tribal impacts reflected in the Desert Southwest Expansion Project pipeline route proposed by Energy Transfer, a project that would parallel the existing Kinder Morgan/El Paso Gas Pipeline crossing Arizona, and proposes to span approximately 50 miles of the lower San Pedro River watershed. We request that FERC investigate the feasibility of the following: 1) Consider cleaner energy sources, such as electrification, to support emerging energy needs versus a gas pipeline with the potential for serious air pollution in a dry, highly combustible, water-stricken desert environment. 2) Consider construction techniques that do not pose ecological threats to one of the southwest’s most important rivers that supports a valuable, biodiverse area and multiple communities that rely on groundwater flow (Energy Transfer indicated their plans to create a concerning under-river pipeline). 3) Consider alternate routes for the pipeline – completely outside of the San Pedro River – due the fragility and sensitive riparian habitat of the area and its biodiversity (home to two endangered bird species: yellow-billed cuckoo and southwestern willow flycatcher). Why are these considerations crucial? The lower San Pedro River watershed is part of the second-largest unfragmented landscape in Arizona and New Mexico and is recognized as a Global Important Bird Area. Its riparian corridor supports more than 400 bird species, an estimated 80 mammal species, 14 fish species, as well as more than 40 species 1 of reptiles and amphibians. The region supports one of the state’s most significant wildlife connectivity corridors, linking the Catalina, Rincon, and Galiuro Mountains. (See Appendix A.) Because of its ecological value, more than 190,000 acres of the San Pedro River Valley watershed have been designated as conservation and mitigation properties by federal, state and county entities to offset harmful environmental impacts from industrial projects that have occurred elsewhere in Arizona. Yet, water resources in the watershed are severely threatened after more than 25 years of drought, recharge deficits, and groundwater over-pumping from agriculture and 45 years of mining. An impromptu open house hosted by Energy Transfer in Oracle, AZ, on April 23, noted that as part of the Desert Southwest Expansion Project, a lateral line is proposed to supply an energy generation facility in the San Manuel area. Such a water-intensive energy center would raise considerable concern, especially due to its location not even seven miles upstream of 3,000 acres of environmentally sensitive mitigation land recently declared, through an Act of Congress, as exchange property for Resolution Copper’s mining development at the San Carlos Apache’s sacred Oak Flat grounds. This exchange property is to be managed by the Bureau of Land Management as part of the San Pedro Riparian National Conservation Area. What’s more, an additional 3,000 acres of mitigation property exist along the river just north of the Oak Flat exchange property. One-thousand acres is managed for the people of Arizona by Arizona Game and Fish, as well property managed by the Bureau of Reclamation and the Salt River Project. The impending water use that will be necessary to support an energy center upstream of these mitigation properties will threaten their very purpose, ecological value and existence. The presence of an energy station will further open the area to additional industrial use, making data center development attractive, in an area that simply does not have the necessary water resources. Additionally, the federally recognized Tohono O'odham Nation and San Carlos Apache Tribe have recently adopted formal resolutions to declare the San Pedro River as a Traditional Cultural Property, based on historical presence and numerous archaeological sites. (See Appendix B and C.) They were not offered an open house by Energy Transfer. We look forward to policy actions by FERC to follow its responsibility for direct contact consultation with Tribes as governmental sovereigns, as per the FERC Policy Statement on Consultation with Indian Tribes in Commission Proceedings, Docket # PL03-4-000, Order #635, of July 23, 2003. Given all of the issues outlined here, we request that FERC investigate the feasibility of considering a completely different pipeline route for the Desert Southwest Expansion Project – one with the least damaging ecological and cultural impacts, including the possibility of placement in an already industrialized corridor near Interstate 10. Irreplaceable cultural resources and the sustainability of the entire lower San Pedro River watershed – the last free-flowing river of the southwest – and beyond, are at stake. Respectfully submitted, Melissa Crytzer Fry, Chairperson On behalf of the Lower San Pedro Watershed Alliance 2 Pima County Wildlife Connectivity Assessment: Detailed Linkages Santa Catalina/Rincon – Galiuro Linkage Design August 2012 Arizona Game and Fish Department Regional Transportation Authority of Pima County Lower San Pedro RiverAPPENDIX A ii Pima County Wildlife Connectivity Assessment: Detailed Linkages Santa Catalina/Rincon – Galiuro Linkage Design Santa Catalina/Rincon – Galiuro Linkage Design Recommended Citation Arizona Game and Fish Department. 2012. …

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  2. Comentarios del público

    Comentario de una persona del público

    1. The proposed pipeline should follow existing disturbed ROWs that have easy access and do not unnecessarily cross sensitive environmental areas. Specifically, I am opposed to a route that crosses the Nature Conservancy’s Muleshoe ranch. A … Leer todo

      The proposed pipeline should follow existing disturbed ROWs that have easy access and do not unnecessarily cross sensitive environmental areas. Specifically, I am opposed to a route that crosses the Nature Conservancy’s Muleshoe ranch. A new pipeline in this area is not consistent with the purpose of landscape conservation that the property is dedicated to and should be reconsidered.

      Original en FERC · 20260624-5098 ↗
  3. The Nature Conservancy- Arizona

    Comments of the Nature Conservancy- Arizona concerning the proposed Desert Southwest Expansion Project under PF26-9.

    Leer el comentario

    The Nature Conservancy www.nature.org [phone] 1510 E. Fort Lowell Rd, Tucson, AZ 85719 - 1 - June 18, 2026 Re: The Nature Conservancy – Notification of High-Level Concerns Regarding Proposed Desert Southwest Expansion Pipeline Crossing the Muleshoe Ranch Cooperative Management Area FERC Docket No. PF26-9-000 The Nature Conservancy (TNC) appreciates the opportunity to provide early, high-level information regarding concerns with the proposed Desert Southwest Expansion Project and its potential routing through the Muleshoe Ranch Cooperative Management Area (CMA) in southeastern Arizona. TNC recognizes the importance of regional energy reliability, while emphasizing the equal need to avoid and minimize environmental harm, particularly where proposed infrastructure will infringe upon highly sensitive watersheds, federally listed species habitat, and landscapes with decades of conservation investment. TNC is a science-based conservation organization whose mission is to conserve the lands and waters on which all life depends. TNC has worked in the Muleshoe landscape for more than forty years and holds both fee lands and grazing lease interests within the CMA. This long-term stewardship role provides TNC with direct management responsibility and substantial on-the-ground experience in this landscape. Based on publicly available information, the Desert Southwest Expansion is proposing a new natural gas pipeline extending from Texas to Arizona that is currently being proposed along a route that parallels the existing El Paso pipeline within the Muleshoe area. The purpose of this letter is to: • Highlight the exceptional conservation importance of the Muleshoe CMA. • Provide early notice of the potential for significant cumulative impacts to sensitive watersheds, habitats, and species, particularly within Hot Springs and Bass Canyon; and • Encourage rigorous due diligence during alternatives evaluation, environmental review, and development of avoidance and mitigation measures commensurate with the sensitivity of this landscape. The Nature Conservancy www.nature.org [phone] 1510 E. Fort Lowell Rd, Tucson, AZ 85719 - 2 - Conservation Importance of the Muleshoe Cooperative Management Area The Muleshoe CMA is a highly protected and intensively managed conservation landscape, not simply undeveloped open space. Since the early 1980s, TNC and agency partners have established layered conservation commitments through fee ownership, stewardship of public grazing lands, and collaborative management under the Muleshoe Ecosystem Management Plan. The ecological significance of this landscape is widely recognized. The Hot Springs watershed is federally designated as an Area of Critical Environmental Concern (ACEC), reflecting the need for heightened management to protect riparian resources and watershed integrity. Both TNC and the Bureau of Land Management hold certificated instream flow rights for water in Hot Springs and Bass canyons, underscoring the importance of sustaining perennial flows and associated ecological functions. Ecologically, the Hot Springs–Bass Canyon system supports seven native desert fish species and includes designated critical habitat for federally threatened and endangered species, including loach minnow and spikedace, as well as Gila chub. Importantly, Hot Springs is one of the longest and most biologically diverse watersheds to remain free of non-native aquatic invasive species and has long served as a focal area for native fish conservation and recovery efforts for that reason. On a broader scale, the Muleshoe CMA is part of the second largest unfragmented landscape in the Southwest and is a critical wildlife connectivity corridor. The convergence of perennial water, unfragmented uplands, and connectivity makes this area increasingly rare and particularly vulnerable to disturbance with lasting ecological consequences. Potential Cumulative Impacts to Sensitive Resources TNC is concerned that introduction of an additional pipeline corridor and associated construction activities within the Muleshoe landscape, especially where the route intersects Bass Canyon and parallels in close proximity to Hot Springs, could result in cumulative impacts extending well beyond the immediate construction footprint. Impacts to Special-Status Species and Critical Habitat The project area includes habitat for multiple federally listed species, including several endangered and threatened native desert fish and other listed wildlife such as yellow-billed cuckoo and Mexican spotted owl. Construction of a large-diameter pipeline typically involves a wide disturbance of corridor, vegetation clearing, trenching, blasting in rocky terrain, heavy equipment uses, and ongoing maintenance access. The Nature Conservancy www.nature.org [phone] 1510 E. Fort Lowell Rd, Tucson, AZ 85719 - 3 - These activities carry the potential for direct habitat loss, increased mortality risk, noise, light and chemical pollution, soil degradation, and long-term fragmentation. In a landscape managed explicitly for biodiversity and connectivity, the addition of an expanded corridor could further reduce habitat function, disrupt wildlife movement, and diminish the integrity of a key regional linkage, further fragmenting one of the largest blocks of intact wildlife habitat in the state. Watershed Sensitivity and Water Quality Risks The Hot Springs and Bass Canyon watersheds are particularly vulnerable due to steep slopes, shallow soils, and rapid runoff response. In this setting, ground disturbance can quickly translate into accelerated erosion and sediment discharge during storm events, with direct consequences for downstream aquatic habitat. Sedimentation that alters pools and stream structure poses a substantial risk to native desert fish that rely on specific habitat features. Additional concerns include water quality risks associated with construction in bedrock, including blasting and release of pollutants. Because dilution …

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  4. Comentarios del público

    Comentario de una persona del público

    1. Presentado en papel o escaneado; ábralo en FERC.

      Original en FERC · 20260622-0002 ↗
  5. Office of Energy Projects

    Letter to Transwestern Pipeline Company, LLC providing comments on the Preliminary Draft Resource Reports 1 and 10 for the planned Desert Southwest Expansion Project under PF26-9.

  6. Office of Energy Projects

    Memo providing meeting notes of the 06/09/2026 Interagency Meeting between FERC staff, Transwestern Pipeline Company, LLC et al. re the Desert Southwest Expansion Project under PF26-9.

  7. Office of Energy Projects

    Memo providing meeting notes of 06/02/2026 bi-weekly pre-filing meeting between FERC staff and Transwestern Pipeline Company, LLC re the Desert Southwest Expansion Project under PF26-9.

  8. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Monthly Progress Report No. 2 for the period of 05/09/2026 to 06/10/2026 re the proposed Desert Southwest Expansion Project under PF26-9.

mayo de 2026

  1. Comentarios del público

    Comentario de una persona del público

    1. My husband and I own land in Hudspeth County outside of Dell City. We bought it with the intent of enjoying the dark skies and installing an observatory and telescopes. We’d like to add our voices to those of our neighbors asking for FERC … Leer todo

      My husband and I own land in Hudspeth County outside of Dell City. We bought it with the intent of enjoying the dark skies and installing an observatory and telescopes. We’d like to add our voices to those of our neighbors asking for FERC to require the Desert Southwest Expansion (DSE) applicant to provide financing for a Fire and EMS Hub near Cornudas to cover the additional risk caused by the new pipeline and provide financing for law enforcement services to cover the additional people who will be working in Hudspeth County. In addition, we’d like to request that FERC require the DSE applicant to design every installation associated with the pipeline, including construction sites, contractor and pipe storage yards, man camps, pumping stations, and meters to minimize light pollution in keeping with the Hudspeth County Orders Regulating Outdoor Lighting to preserve dark skies. Shining light into the sky wastes energy, costs money, and ruins the magnificent dark sky. It does not increase security or safety. Using a light pollution limiting design is a win-win. Thank you,

      Original en FERC · 20260529-5242 ↗
  2. Office of Energy Projects

    Memo providing meeting notes of 05/19/2026 Pre-filing Biweekly Conference Call between FERC staff, Transwestern Pipeline Company, LLC et al. re the Desert Southwest Expansion Project under PF26-9.

  3. Comentarios del público

    2 comentarios de personas del público

    1. Final Supplemental FERC Comment ​Docket No.: PF26-9-000 Project: Desert Southwest Expansion (DSE) Filer: [name] M. [name], Dell City, TX ​Subject: Supplemental Scoping Comment – Infrastructure Resilience & Public Safety Mitigation ​1. … Leer todo

      Final Supplemental FERC Comment ​Docket No.: PF26-9-000 Project: Desert Southwest Expansion (DSE) Filer: [name] M. [name], Dell City, TX ​Subject: Supplemental Scoping Comment – Infrastructure Resilience & Public Safety Mitigation ​1. Workforce Housing (Man Camp) Socioeconomic Mitigation The projected influx of thousands of temporary workers (the "Man Camp") represents a population surge that will double the occupancy of the Dell Valley overnight. This creates an immediate, adverse impact on local security, water resources, and emergency response. ​Permanent Infrastructure Requirement: FERC should require the applicant to fund permanent utility and safety infrastructure as a condition of their certificate. Temporary water and sewage solutions for man camps risk depleting the local aquifer with no long-term benefit to the county. ​Geothermal Direct Use: We propose that the DSE project partner with local stakeholders to utilize Geothermal Direct Use for the camp’s operational needs. This ensures the camp’s consumption does not jeopardize the water security of Dell Valley’s agricultural base and provides a sustainable legacy for community water wells. ​2. Hardened Public Safety Communications (Sheriff & EMS) Hudspeth County is currently evaluating the expansion of law enforcement facilities and deputy housing in the Dell Valley. These facilities require hardened, CJIS-compliant communications. ​Mandatory Joint-Use Trench: FERC must mandate a Joint-Use Trench for the co-location of buried fiber optic cables within the pipeline right-of-way. ​Reliability vs. Aerial: Current aerial lines along the 62/180 corridor are vulnerable to 110°F heat and high winds. A buried, hardened backbone is the only way to ensure secure data links between Dell City and the county seat in Sierra Blanca. ​Cornudas Fire/EMS Hub: The DSE project must mitigate its impact on emergency response times by facilitating a Fire and EMS Hub near Cornudas. This hub must be supported by buried fiber and geothermal baseload power to remain functional during extreme weather where solar efficiency fails. ​3. Technical Justification: The "Solar Gap" High-desert surface temperatures frequently exceed the operational thresholds for peak solar efficiency. The co-location of fiber with the pipeline (buried at a stable earth temperature) and the use of geothermal energy are necessary mitigations for the "Solar Gap" inherent in our desert basin during emergency operations.

      Original en FERC · 20260518-5002 ↗
    2. ​TO: Kimberly D. Bose, Secretary, Federal Energy Regulatory Commission RE: Scoping Comments for the Desert Southwest Expansion Project DOCKET NO.: PF26-9-000 FROM: [name] M. [name], Dell City, Texas (Hudspeth County) ​Dear Secretary … Leer todo

      ​TO: Kimberly D. Bose, Secretary, Federal Energy Regulatory Commission RE: Scoping Comments for the Desert Southwest Expansion Project DOCKET NO.: PF26-9-000 FROM: [name] M. [name], Dell City, Texas (Hudspeth County) ​Dear Secretary Bose, ​As a stakeholder and landowner in the high desert of Hudspeth County, I am submitting these scoping comments regarding the proposed 48-inch natural gas pipeline expansion. The Commission must move beyond a narrow environmental review and address the "Full Circle" cumulative impacts on our community’s infrastructure, energy independence, and digital sovereignty. ​I urge the Commission to address the following five critical areas in its Environmental Impact Statement (EIS): ​1. Requirement to Evaluate Geothermal Energy as a Reasonable Alternative Under NEPA, the Commission is required to evaluate reasonable alternatives. The Dell Valley sits on a high-gradient geothermal reservoir. The EIS must analyze whether a Geothermal Power Block in Far West Texas could provide a more sustainable, less invasive solution for the Southwest’s energy needs than the permanent disruption of a 48-inch fossil fuel corridor. ​2. Cumulative Impact on Fossil Water and Aquifer Health Our community stewards the Bone Spring-Victorio Peak Aquifer. The EIS must analyze the potential for cross-contamination of brackish and fresh water zones during the trenching and horizontal directional drilling (HDD) of this 48-inch line. We cannot risk our "Ancestor Grade" water for a temporary industrial project. ​3. Economic Sovereignty and Industrial Mitigation While this project adds an estimated $6 million to the Hudspeth County tax base, that revenue must be protected from "general fund depletion." We request that the Commission mandate Industrial Mitigation Fees specifically earmarked for Regional Safety Hubs (fire/EMS) and geothermal infrastructure development, ensuring the county gains a permanent energy asset. ​4. Safety and Emergency Response Gaps Large portions of this route pass through remote ranching communities, like Sunset Ranches and Cornudas, where residents are an hour or more away from help. The EIS must include a comprehensive Emergency Response Gap Analysis, requiring the applicant to fund local emergency infrastructure that bridges this dangerous gap. ​5. Digital Infrastructure and Vocational Stewardship (Project Geppetto) A project of this magnitude requires sophisticated monitoring. We request that FERC mandate "Open Access Fiber" be laid within the pipeline's right-of-way to provide rural residents with high-speed connectivity. Furthermore, the applicant must fund a Vocational Stewardship Program (Project Geppetto) to train local residents in the high-tech maintenance of energy and fiber infrastructure, turning a construction site into a permanent career pipeline for the "Younger Ancestors." ​Conclusion We are not merely "neighbors" to this project; we are the guardians of a historical desert corridor. We ask the Commission to require the applicant to integrate with our community’s push for Geothermal and Digital Sovereignty. ​Sincerely, [name] M. [name]

      Original en FERC · 20260518-5000 ↗
  4. Office of Energy Projects

    Memo providing meeting notes of 05/05/2026 Pre-filing Biweekly Conference Call between FERC staff, Transwestern Pipeline Company, LLC et al. re the Desert Southwest Expansion Project under PF26-9.

  5. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Monthly Progress Report No. 1 for the period of 04/03/2026 to 05/08/2026 re the proposed Desert Southwest Expansion Project under PF26-9.

  6. Cascabel Conservation Association

    Comments of Cascabel Conservation Association on the proposed Desert Southwest Expansion Project under PF26-9.

  7. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Draft Resource Report No. 10 re the Desert Southwest Expansion Project under PF26-9.

  8. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits draft Resource Reports Nos. 1 and 10 and updated stakeholder list re the Desert Southwest Expansion Project under PF26-9.

abril de 2026

  1. Comentarios del público

    Comentario de una persona del público

    1. Presentado en papel o escaneado; ábralo en FERC.

      Original en FERC · 20260430-5044 ↗
  2. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Third Party Contractor Memorandum of Understanding re the Desert Southwest Expansion Project under PF26-9.

  3. Office of Energy Projects

    Letter to Transwestern Pipeline Company, LLC approving the 03/27/2026 request to use FERC's pre-filing review process for the planned Desert Southwest Expansion Project under PF26-9.

    FERC acepta el proyecto en revisión previa. Aquí empieza el expediente.

marzo de 2026

  1. Transwestern Pipeline Company, LLC

    Transwestern Pipeline Company, LLC submits Request to Initiate Pre-Filing Review for the Desert Southwest Expansion Project under PF26-9.