Allen
Allen is a natural gas plant in Shelby County, Tennessee, operated by Tennessee Valley Authority. Retired units here add up to 1,492 MW across 21 units, taken out of service between 2018 and 2025. Its oldest working unit dates from 1972, earlier than at any other natural gas plant in Tennessee. Two units here can switch between natural gas and oil.
Nameplate capacity, 2025
1,290 MW
1,145 MW net summer capacity
5 operable units
- Gas combined cycle1,171 MW91%
- Oil-fired119 MW9.2%
Unit by unit, 1959 to 2025
operating in 2025retiredbar height follows unit size
3 units Coal steam, 990 MW, 1959, retired by 2018
16 units Oil-fired, 382 MW, 1971, retired by 2025
2 units Oil-fired, 119 MW, 1972
2 units Oil-fired, 119 MW, 1972, retired by 2025
3 units Gas combined cycle, 1,171 MW, 2018
Among Tennessee’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Cumberland (TN)2,600 MW
- 2Watts Bar Nuclear Plant2,540 MW
- 3Sequoyah2,441 MW
- 7Johnsonville1,676 MW
- 8Lagoon Creek1,625 MW
- 9Allenthis plant
- 10John Sevier997 MW
- 11Gleason Generating Facility568 MW
Other rankings
- All US power plants
- 192nd of 14,286
- Power plants in Tennessee
- 9th of 99
- US natural gas plants
- 77th of 1,961
- Natural gas plants in Tennessee
- 3rd of 12
- Plants in the Tennessee Valley Authority balancing area
- 12th of 152
- Plants run by Tennessee Valley Authority
- 12th of 53
- Biggest single unit, among Tennessee’s plants
- 4th of 99
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| G19 | Oil-fired | 59.6 MW | 46.4 MW | 1972 | Operating |
| G20 | Oil-fired | 59.6 MW | 46.4 MW | 1972 | Operating |
| CTG1 | Gas combined cycle | 347 MW | 312 MW | 2018 | Operating |
| CTG2 | Gas combined cycle | 347 MW | 312 MW | 2018 | Operating |
| STG1 | Gas combined cycle | 477 MW | 428 MW | 2018 | Operating |
Retired units
| Unit | Technology | Nameplate | In service |
|---|---|---|---|
| 1 | Coal steam | 330 MW | 1959–2018 |
| 2 | Coal steam | 330 MW | 1959–2018 |
| 3 | Coal steam | 330 MW | 1959–2018 |
| G10 | Oil-fired | 23.9 MW | 1971–2025 |
| G11 | Oil-fired | 23.9 MW | 1971–2025 |
| G12 | Oil-fired | 23.9 MW | 1971–2025 |
| G13 | Oil-fired | 23.9 MW | 1971–2025 |
| G14 | Oil-fired | 23.9 MW | 1971–2025 |
| G15 | Oil-fired | 23.9 MW | 1971–2025 |
| G16 | Oil-fired | 23.9 MW | 1971–2025 |
| G17 | Oil-fired | 59.6 MW | 1972–2025 |
| G18 | Oil-fired | 59.6 MW | 1972–2025 |
| GT1 | Oil-fired | 23.9 MW | 1971–2025 |
| GT2 | Oil-fired | 23.9 MW | 1971–2025 |
| GT3 | Oil-fired | 23.9 MW | 1971–2025 |
| GT4 | Oil-fired | 23.9 MW | 1971–2025 |
| GT5 | Oil-fired | 23.9 MW | 1971–2025 |
| GT6 | Oil-fired | 23.9 MW | 1971–2025 |
| GT7 | Oil-fired | 23.9 MW | 1971–2025 |
| GT8 | Oil-fired | 23.9 MW | 1971–2025 |
| GT9 | Oil-fired | 23.9 MW | 1971–2025 |
Grid and site
- Balancing area
- Tennessee Valley Authority
- Reliability region
- SERC Reliability Corporation
- Highest grid connection voltage
- 161 kV
- Water source
- Mississippi River
- Nearest town on record
- Memphis
- Operator type
- Utility
- Coordinates
- 35.074°N, 90.149°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Wildflower Solar, LLC (MS) | Solar | 100 MW | 8.0 mi south |
| TVA Southaven Combined Cycle | Natural gas | 904 MW | 8.4 mi southeast |
| West Memphis Solar Station | Solar | 180 MW | 10.8 mi northwest |
| SR Innovation - NIKE PV | Solar | 1.5 MW | 18.8 mi northeast |
| Big Cypress Solar, LLC | Solar | 180 MW | 20.7 mi northwest |
| IKEA Memphis 508 | Solar | 1.1 MW | 21.3 mi east |
| Millington Solar Farm | Solar | 53 MW | 25.4 mi northeast |
| SR West Marshall, LLC | Solar | 4.8 MW | 26.6 mi east |