Ridgeline Expansion Project is a natural gas pipeline expansion project by East Tennessee Nat Gas Co in TN. It is in service. Stated capacity is 0.3 Bcf/d. FERC docket CP23-516. Sources: FERC filings, the sponsor's public material and EIA's pipeline project tracker. Last verified by Enercast on Nov 10, 2026.
| Status | In service | Company, read Nov 11, 2026 |
|---|---|---|
| Capacity | 0.3 Bcf/d stated | EIA, dated Oct 26, 2026 |
| In-service timing | In service | Company, read Nov 11, 2026 |
| Operator | East Tennessee Nat Gas Co | EIA, dated Oct 26, 2026 |
| Project type | Expansion | EIA, dated Oct 26, 2026 |
| States | TN | EIA, dated Oct 26, 2026 |
| Length | 122.2 miles | EIA, dated Oct 26, 2026 |
| Jurisdiction | Interstate (FERC-regulated) · FERC | EIA, dated Oct 26, 2026 |
| FERC docket | CP23-516 | EIA, dated Oct 26, 2026 |
| Demand served | Power | EIA, dated Oct 26, 2026 |
| Last verified | Nov 10, 2026 | all sources fetched |
Capacity and in-service timing are what the source states. None is measured or forecast by Enercast. How to read this page.
Milestones
- FERC approval stated
- Partial service stated
Change log
| Recorded | Field | Change | Source |
|---|---|---|---|
| Nov 11, 2026 | Status | Partial service → In service | Company, read Nov 11, 2026 |
| Nov 11, 2026 | Stated in-service | 2026 → November 2026 | Company, read Nov 11, 2026 |
| Nov 10, 2026 | Status | Under construction → Partial service | FERC, dated Oct 30, 2026 |
“Recorded” is the day Enercast approved the change, not the day it happened.
Sources
- FERC: FERC Approved Major Pipeline Projects (as of 09/24/2026): CP23-516
- FERC: FERC eLibrary 20261030-3021 (CP23-516): Order/Opinion / Delegated Order
- Company: Enbridge: Ridgeline Expansion project page“construction will begin Oct. 21, 2025 with a targeted in-service date of November 2026 and complete restoration in the spring of 2027.”
- Company: Enbridge Q3 2026 earnings presentation“Completed Tennessee Ridgeline5, which will serve a TVA6 gas-fired plant”
- EIA: EIA Natural Gas Pipeline Projects, release 2026-11-04: Ridgeline Expansion Project