# Federal Register #CP27-8-000

FERC review of NS-12 observation well conversion at St. Jacob Storage Field

**Posted:** October 30, 2026
**Respond By:** December 28, 2026
**Identifier:** CP27-8-000

The Federal Energy Regulatory Commission is reviewing a request by Enable Mississippi River Transmission, LLC, to convert an observation well at an Illinois gas storage field into a salt water disposal well.
- **Government buyer:** U.S. Department of Energy, Federal Energy Regulatory Commission (FERC).
- **Applicant:** Enable Mississippi River Transmission, LLC.
- **Requested work:** The NS-12 Well Conversion Project would convert an existing observation well to a salt water disposal well at the St. Jacob Storage Field in Madison County, Illinois.
- **Project details:** The applicant estimates the project cost at $200,000 and states the conversion will not affect the field’s certificated inventory, reservoir pressure, reservoir or buffer boundaries, or capacity.
- **Procurement status:** This is a regulatory authorization notice, not a solicitation for products or services. No equipment, product quantities, or contract period are specified.

### Description

Enable Mississippi River Transmission, LLC filed a prior notice request under the Natural Gas Act and its blanket certificate for authorization to convert an existing observation well to a salt water disposal well at the St. Jacob Storage Field in Madison County, Illinois. The project, identified as the NS-12 Well Conversion Project, is stated to have no impact on the field’s certificated physical parameters, including inventory, reservoir pressure, boundaries, and capacity. The estimated project cost is $200,000. Protests, motions to intervene, and comments are due by 5 p.m. Eastern Time on December 28, 2026.

[View original listing](https://www.federalregister.gov/documents/2026/10/30/2026-22141/enable-mississippi-river-transmission-llc-notice-of-request-under-blanket-authorization-and)