Mountain Home Energy Center
Washington County, Tennessee · EIA plant ID 59809 · Operator: Energy Systems Group LLC
×3 MW natural gas retired since 2020 (latest May 2022)
Nameplate4MWSummer 4 MW
Generators2in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online2002Runs as rarely runs
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2014 | 7.3 | 12.3% | 10,237 |
| 2015 | 0 | 0.0% | — |
| 2016 | 2.2 | 3.7% | 5,757 |
| 2017 | 14.1 | 23.7% | 10,841 |
| 2018 | 14.2 | 23.8% | 9,824 |
| 2019 | 17.6 | 29.5% | 8,612 |
| 2020 | 17.3 | 28.9% | 9,218 |
| 2021 | 18.2 | 30.5% | 9,208 |
| 2022 | 5.7 | 9.6% | 9,144 |
| 2023 | 0 | 0.0% | — |
| 2024 | 0 | 0.0% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| GEN2 | Petroleum Liquids | IC | 1.8 | 1.8 | Jun 2002 | Operating (Standby / backup) | — | coming soon |
| GEN3 | Petroleum Liquids | IC | 1.8 | 1.8 | Jun 2002 | Operating (Standby / backup) | — | coming soon |
| GEN1 | Natural Gas Internal Combustion Engine | IC | 3.2 | 3.2 | Jun 2002 | Retired May 2022 | — | coming soon |
Owner / operator
Operator: Energy Systems Group LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Computershare Trust Company, N.A. | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| SR Jonesborough | 4 MW | 14.4 km |
| Boone Dam | 106 MW | 15.5 km |
| SR Gray | 6 MW | 16.8 km |
| SR Washington I, LLC | 9 MW | 20.2 km |
| Watauga | 58 MW | 22.8 km |
| Wilbur | 11 MW | 22.8 km |