Mississippi's Mega Cavern: Storing More Gas Underground
Published Date: 11/18/2025
Notice
Summary
Leaf River Energy Center wants to boost its natural gas storage in Mississippi by adding a huge new cavern and upgrading equipment. This means more gas can be stored and moved, helping energy customers get what they need. If you want to speak up or get involved, you’ve got until a set deadline to jump in!
Analyzed Economic Effects
4 provisions identified: 2 benefits, 0 costs, 2 mixed.
17.62 Bcf Storage Expansion in Mississippi
Leaf River Energy Center applied to increase natural gas working storage at the New Home Salt Dome in Smith, Jasper, and Clarke Counties, Mississippi by 17.62 billion cubic feet (Bcf). The application describes adding a new Cavern Well #5 with 12.52 Bcf, increasing Caverns #2 and #4 by 2.55 Bcf each, building pipeline headers and lines, and installing new compressors (27,010 hp and 6,130 hp).
Request for Market-Based Rate Authority
Leaf River Energy Center seeks reaffirmation of market-based rate authority for its existing firm and interruptible storage services, storage derivative hub services, and interruptible wheeling services, and requests market-based rate authority for a new proposed firm wheeling service. The request also seeks any related authorizations and waivers needed to grant these authorities.
Intervene or Comment by Dec 4, 2025
Any person may file comments, protests, or a motion to intervene in Docket No. CP26-17-000. The deadline to file a motion to intervene or to submit comments or protests is 5:00 p.m. Eastern Time on December 4, 2025, and there is no fee to file.
90-Day Environmental Review Schedule Rule
Pursuant to 18 CFR 157.9, Commission staff will, within 90 days of this Notice, either complete its environmental review and place it in the public record for this proceeding or issue a Notice of Schedule for Environmental Review. If a Notice of Schedule is issued, it will indicate the anticipated date for the final environmental impact statement (FEIS) or environmental assessment (EA) and the requirement to complete all federal authorizations within 90 days of the FEIS or EA issuance.
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