Tenaska Frontier Generation Station
Grimes County, Texas · EIA plant ID 55062 · Operator: Tenaska Frontier Partners Ltd
Nameplate940MWSummer 860 MW
Generators4in service
Net generation4,767GWh12 mo to Aug 2026
Capacity factor63%gas/coal/oil units, summer MW
Heat rate7,367Btu/kWhfossil units, electric fuel, HHV
First online2000Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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), gas/coal/oil 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) |
|---|---|---|---|
| 2001 | 4,335.1 | — | — |
| 2002 | 4,139 | — | — |
| 2003 | 4,115.6 | 54.6% | 7,264 |
| 2004 | 4,165.2 | 55.1% | 7,220 |
| 2005 | 4,617.4 | 61.3% | 7,238 |
| 2006 | 4,143 | 55.0% | 7,229 |
| 2007 | 4,625.4 | 61.4% | 7,186 |
| 2008 | 4,749.8 | 62.9% | 7,191 |
| 2009 | 5,040.9 | 66.9% | 6,842 |
| 2010 | 3,436.3 | 45.6% | 7,276 |
| 2011 | 3,990.6 | 53.0% | 6,956 |
| 2012 | 4,962.8 | 65.7% | 7,008 |
| 2013 | 4,615.1 | 61.3% | 7,013 |
| 2014 | 2,483.8 | 33.0% | 7,292 |
| 2015 | 3,578 | 47.5% | 7,240 |
| 2016 | 4,092 | 54.2% | 7,123 |
| 2017 | 2,823.1 | 37.5% | 7,198 |
| 2018 | 3,566.2 | 47.3% | 7,061 |
| 2019 | 3,993.4 | 53.0% | 7,034 |
| 2020 | 3,700.2 | 49.0% | 7,066 |
| 2021 | 2,587 | 34.3% | 7,356 |
| 2022 | 4,312.9 | 57.3% | 7,296 |
| 2023 | 4,174 | 55.4% | 7,345 |
| 2024 | 4,297 | 56.9% | 7,288 |
| 2025 | 3,503.8 | 46.5% | 7,232 |
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 |
|---|---|---|---|---|---|---|---|---|
| GTG1 | Natural Gas Fired Combined Cycle | CT | 183.2 | 155 | May 2000 | Operating | — | coming soon |
| GTG2 | Natural Gas Fired Combined Cycle | CT | 183.2 | 155 | May 2000 | Operating | — | coming soon |
| GTG3 | Natural Gas Fired Combined Cycle | CT | 183.2 | 155 | May 2000 | Operating | — | coming soon |
| STG1 | Natural Gas Fired Combined Cycle | CA | 390.1 | 395 | May 2000 | Operating | — | coming soon |
Owner / operator
Operator: Tenaska Frontier Partners Ltd. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Tanaska Grimes Partners LP | 74.3% | 698 MW |
| Montana Grimes Frontier LP | 24.8% | 233 MW |
| Tenaska VI Partners LP | 0.5% | 4 MW |
| Diamond Frontier LLC | 0.3% | 3 MW |
| Montana Grimes County LLC | 0.3% | 2 MW |
Nearby plants
Within 80 km.
| TX15 Limousin Oak Storage | 100 MW | 9.2 km |
| Grimes County Solar | 210 MW | 17.8 km |
| Blue Jay Solar I, LLC | 52 MW | 18.8 km |
| Highway 6 BESS | 10 MW | 26.4 km |
| Piney Woods Solar | — | 27.6 km |
| Tex-Bar ESS | — | 39.1 km |