Notice2025-23948
Mangum Gas Storage LLC; Notice of Availability of the Environmental Assessment for the Proposed 2025 Amendment Project
Primary source
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Published
December 30, 2025
Issuing agencies
Energy DepartmentFederal Energy Regulatory Commission
Full Text
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<title>Federal Register, Volume 90 Issue 246 (Tuesday, December 30, 2025)</title>
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[Federal Register Volume 90, Number 246 (Tuesday, December 30, 2025)]
[Notices]
[Pages 61131-61132]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-23948]
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DEPARTMENT OF ENERGY
Federal Energy Regulatory Commission
[Docket No. CP26-233-000]
Mangum Gas Storage LLC; Notice of Availability of the
Environmental Assessment for the Proposed 2025 Amendment Project
Any person wishing to comment on the EA may do so. To ensure
consideration of your comments on the proposal prior to making a
decision on the project, it is important that the Commission receive
your comments on or before 5:00 p.m. Eastern Time on January 20, 2026.
Instructions for filing comments are provided on page 3.
The proposed project is an amendment to the Certificate of Public
Convenience and Necessity (Certificate) issued by the Commission on
March 17, 2011, as amended on November 17, 2016, and on April 23, 2020,
in Docket Nos. CP10-22-000, CP16-18-000, and CP20-77-000, respectively.
Currently, Magnum is authorized to construct and operate a natural gas
storage facility with a total working gas capacity of 21 billion cubic
feet (Bcf) consisting of two storage caverns, one brine disposal pond
and associated facilities, compression facilities, a 61.6-mile-long,
36-inch-diameter header pipeline, and other related facilities. The
proposed modifications consist primarily of changes to the locations of
previously approved facilities and utilities at the storage site.
Magnum also requests authorization to redesign two authorized caverns
for 5.2 Bcf of working gas each and to construct and operate two
additional storage caverns with 5.2 Bcf of working gas capacity each,
one additional brine disposal pond and related facilities, and two new
pipeline interconnections. Magnum's stated purpose is to modify its
Certificate to reflect new construction, operational and commercial
needs, and provide new competitive firm and interruptible natural gas
storage, hub, and wheeling services in the Western United States.
The EA assesses the potential environmental effects of the
Amendment Project in accordance with the requirements of the National
Environmental Policy Act (NEPA). The FERC staff concludes that approval
of the Amendment Project would not constitute a major federal action
significantly affecting the quality of the human environment.
The Amendment Project includes the following facilities within the
storage site:
<bullet> four below-ground, solution mined storage caverns (CW-3,
CW-4, CW-25, and CW-26);
<bullet> two water supply wells (GS-MH-4 and GS-MH-5);
<bullet> compression, substation, and dehydration and metering
facilities;
<bullet> two large-scale brine evaporation ponds (Pond 3 and Pond
5);
<bullet> maintenance and laydown area;
<bullet> office/warehouse building;
<bullet> site-wide utility corridors containing water, brine and
power lines;
<bullet> portions of the 4-inch-diameter, about 9-mile-long gas
supply line connected to the local gas distribution company;
<bullet> portions of the 36-inch-diameter, about 61.5 mile long
header pipeline (Header) and associated block valves that extend from
the Storage Site near Delta in Millard County to the interstate
pipeline system near Goshen in Utah County;
<bullet> two interconnection options to the adjacent Kern River
Delta Lateral (a recently constructed pipeline located just east of the
Amendment Project); and
<bullet> two interconnection options to the Intermountain Power
Plant (IPP--a newly constructed hydrogen and natural
[[Page 61132]]
gas-fired power plant located directly north and adjacent to the
Amendment Project).
The Commission mailed a copy of the Notice of Availability of the
EA to federal, state, and local government representatives and
agencies; elected officials; environmental and public interest groups;
Native American tribes; potentially affected landowners and other
interested individuals and groups; and newspapers and libraries in the
Amendment Project area. The EA is only available in electronic format.
It may be viewed and downloaded from the FERC's website (<a href="http://www.ferc.gov">www.ferc.gov</a>),
on the natural gas environmental documents page (<a href="https://www.ferc.gov/industries-data/natural-gas/environment/environmental-documents">https://www.ferc.gov/industries-data/natural-gas/environment/environmental-documents</a>). In
addition, the EA may be accessed by using the eLibrary link on the
FERC's website. Click on the eLibrary link (<a href="https://elibrary.ferc.gov/eLibrary/search">https://elibrary.ferc.gov/eLibrary/search</a>), select ``General Search'' and enter the docket number
in the ``Docket Number'' field, excluding the last three digits (i.e.,
CP25-233). Be sure you have selected an appropriate date range. For
assistance, please contact FERC Online Support at
<a href="/cdn-cgi/l/email-protection#4b0d2e392804252722252e183e3b3b24393f0b2d2e3928652c243d"><span class="__cf_email__" data-cfemail="a2e4c7d0c1edcccecbccc7f1d7d2d2cdd0d6e2c4c7d0c18cc5cdd4">[email protected]</span></a> or toll free at (866) 208-3676, or for TTY,
contact (202) 502-8659.
The EA is not a decision document. It presents Commission staff's
independent analysis of the environmental issues for the Commission to
consider when addressing the merits of all issues in this proceeding.
Your comments should focus on the EA's disclosure and discussion of
potential environmental effects, reasonable alternatives, and measures
to avoid or lessen environmental impacts. The more specific your
comments, the more useful they will be. For your convenience, there are
three methods you can use to file your comments to the Commission. The
Commission encourages electronic filing of comments and has staff
available to assist you at (866) 208-3676 or
<a href="/cdn-cgi/l/email-protection#cd8ba8bfae82a3a1a4a3a89eb8bdbda2bfb98daba8bfaee3aaa2bb"><span class="__cf_email__" data-cfemail="1b5d7e697854757772757e486e6b6b74696f5b7d7e6978357c746d">[email protected]</span></a>. Please carefully follow these instructions
so that your comments are properly recorded.
(1) You can file your comments electronically using the eComment
feature on the Commission's website (<a href="http://www.ferc.gov">www.ferc.gov</a>) under the link to
FERC Online. This is an easy method for submitting brief, text-only
comments on a project;
(2) You can also file your comments electronically using the
eFiling feature on the Commission's website (<a href="http://www.ferc.gov">www.ferc.gov</a>) under the
link to FERC Online. With eFiling, you can provide comments in a
variety of formats by attaching them as a file with your submission.
New eFiling users must first create an account by clicking on
``eRegister.'' You must select the type of filing you are making. If
you are filing a comment on a particular project, please select
``Comment on a Filing''; or
(3) You can file a paper copy of your comments by mailing them to
the Commission. Be sure to reference the Amendment Project docket
number (CP25-233-000) in your letter. Submissions sent via the U.S.
Postal Service must be addressed to: Debbie-Anne A. Reese, Secretary,
Federal Energy Regulatory Commission, 888 First Street NE, Room 1A,
Washington, DC 20426. Submissions sent via any other carrier must be
addressed to: Debbie-Anne A. Reese, Secretary, Federal Energy
Regulatory Commission, 12225 Wilkins Avenue, Rockville, Maryland 20852.
Filing environmental comments will not give you intervenor status,
but you do not need intervenor status to have your comments considered.
Only intervenors have the right to seek rehearing or judicial review of
the Commission's decision. At this point in this proceeding, the
timeframe for filing timely intervention requests has expired. Any
person seeking to become a party to the proceeding must file a motion
to intervene out-of-time pursuant to Rule 214(b)(3) and (d) of the
Commission's Rules of Practice and Procedures (18 CFR 385.214(b)(3) and
(d)) and show good cause why the time limitation should be waived.
Motions to intervene are more fully described at <a href="https://www.ferc.gov/how-intervene">https://www.ferc.gov/how-intervene</a>.
For public inquiries and assistance with making filings such as
interventions, comments, or requests for rehearing, contact the Office
of Public Participation at (202) 502-6595 or <a href="/cdn-cgi/l/email-protection#d996898999bfbcabbaf7beb6af"><span class="__cf_email__" data-cfemail="6d223d3d2d0b081f0e430a021b">[email protected]</span></a>. Additional
information about the Amendment Project is available from the FERC
website (<a href="http://www.ferc.gov">www.ferc.gov</a>) using the eLibrary link. The eLibrary link also
provides access to the texts of all formal documents issued by the
Commission, such as orders, notices, and rulemakings.
In addition, the Commission offers a free service called
eSubscription which allows you to keep track of all formal issuances
and submittals in specific dockets. This can reduce the amount of time
you spend researching proceedings by automatically providing you with
notification of these filings, document summaries, and direct links to
the documents. Go to <a href="https://www.ferc.gov/ferc-online/overview">https://www.ferc.gov/ferc-online/overview</a> to
register for eSubscription.
Authority: 18 CFR 2.1.
Dated: December 19, 2025.
Debbie-Anne A. Reese,
Secretary.
[FR Doc. 2025-23948 Filed 12-29-25; 8:45 am]
BILLING CODE 6717-01-P
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