- Combustion
- In development
- Operating
- 10 · 100 · 1,000 MW
Map
- Combustion
- In development
- Operating
Knox Lee: location and 2 exact-grade projects within 15 mi. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Knox Lee
Power plant · Gas, steam turbine
Key facts
Power plant · Gas, steam turbineran 18% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1974
- Net generation, 2025
- 546,128 MWh
- Grid
- 138 kV to Southwestern Electric Power Co (SWPP)
- Location
- Gregg County, Texas
- Operated by
- Southwestern Electric Power Co
Output
- Gas
- Oil
Details
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- Technology
- Gas, steam turbine source: “Natural Gas Steam Turbine”
- Age
- 52 years since 1974
- Unused energy
- 2,529 GWh 2025Unused energyA lead, not a guarantee: MW × hours × (1 − capacity factor) for the latest year (EIA-923), gas, coal and oil plants only. Air-permit run-hour caps, heat rate (cost to run) and capacity-market or reliability obligations can rule it out.
- Heat rate
- 11,653 Btu/kWh 2025
All 7 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Gem |
|
| EPA greenhouse gas reporting (GHGRP) |
|
| Fuel burned (MMBtu), 2025 | 6,364,197 |
| Capacity factor, 2025 | 0.178 |
| Heat rate (Btu/kWh), 2025 | 11,653.3 |
| Net generation (MWh), 2025 | 546,128 |
| Balancing authority code | SWPP |
Retirement
EIA-860M September 2026StatusSome generators have retired; the rest of the plant is still in service. As of EIA-860M for September 2026.- Capacity retired
- 150 MW
- Generators retired
- 3
- Capacity still in service
- 351 MW
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 4 | Natural Gas Steam Turbine | 74 MW | Retired | December 2018 |
| 2 | Natural Gas Steam Turbine | 38 MW | Retired | May 2020 |
| 3 | Natural Gas Steam Turbine | 38 MW | Retired | May 2020 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 138 kV
- Transmission or distribution system owner
- Southwestern Electric Power Co
- Balancing authority
- Southwest Power Pool
- NERC region
- MRO
Transmission lines within 15 mi (10)
- Southwestern Electric Power Company 138 kV line (OSM way 291225108)
- American Electric Power 138 kV line (OSM way 20925281)
- Southwestern Electric Power Company 138 kV line (OSM way 258832990)
- 138 kV line (OSM way 21208316)
- 138 kV line (OSM way 1501249849)
- Southwestern Electric Power Company 138 kV line (OSM way 343430389)
- Southwestern Electric Power Company 138 kV line (OSM way 343430388)
- Southwestern Electric Power Company 138 kV line (OSM way 291225146)
- American Electric Power 138 kV line (OSM way 291225024)
- Power line, voltage not stated (OSM way 291225075)
Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Ownership
2 companies2| Company | Role | Share | As of | Source |
|---|---|---|---|---|
| Southwestern Electric Power Co | Operator | EIA-860M | ||
| AMERICAN ELECTRIC POWER CO INC | Owner | 100.0% | Dec 31, 2023 | EPA GHGRP |
Timeline
- Stated Units 2, 3 scheduled to retire, 76 MW · EIA-860M
- Stated Unit 4 scheduled to retire, 74 MW · EIA-860M
- In service · EIA-860M
Sources
6 sourcesSources EIA-860M · GEM · OpenStreetMap · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
© OpenStreetMap contributors
Sources
- EIA-860M
- GEMGlobal Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- OpenStreetMap© OpenStreetMap contributors. Power lines, cables and substations filtered and reshaped by Inframation from the OpenStreetMap elements in Overture Maps' base/infrastructure theme; this derived database is available under the Open Database License 1.0 as GeoParquet files at https://tiles.inframation.io/grid/osm-power/ (latest.json names the current version's files; licence: https://www.openstreetmap.org/copyright)
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Around this plant
Nearby
within 15 mi| Project | Kind | Away | MW |
|---|---|---|---|
| Martin Lake Postponed | Coal | 9.0 mi | 800 |
| Hallsville Announced | Gas, combustion turbine | 10.8 mi | 450 |
Sources EIA-860M