Summit Lake
Union County, Iowa · EIA plant ID 1206 · Operator: Central Iowa Power Cooperative
×23 MW natural gas retired since 2020 (latest Jan 2021)
Nameplate119MWSummer 112 MW
Generators5in service
Net generation109GWh12 mo to Dec 2025
Capacity factor11%gas/coal/oil units, summer MW
Heat rate8,928Btu/kWhfossil units, electric fuel, HHV
First online1973Runs as peaking
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 | 29.7 | — | — |
| 2002 | 24.9 | — | — |
| 2003 | 18.4 | 2.4% | 13,391 |
| 2004 | 14.6 | 1.9% | 12,945 |
| 2005 | 31.7 | 4.2% | 12,757 |
| 2006 | 14.9 | 1.9% | 13,285 |
| 2007 | 23 | 3.0% | 13,658 |
| 2008 | 2.4 | 0.3% | 14,278 |
| 2009 | 1.3 | 0.2% | 16,134 |
| 2010 | 26.4 | 3.5% | 17,873 |
| 2011 | 16.5 | 2.2% | 15,053 |
| 2012 | 27.3 | 3.6% | 13,188 |
| 2013 | 11.6 | 1.8% | 13,093 |
| 2014 | 6.4 | 1.0% | 13,188 |
| 2015 | 6.4 | 1.0% | 12,665 |
| 2016 | 13.9 | 2.1% | 12,843 |
| 2017 | 8.7 | 1.3% | 12,565 |
| 2018 | 10.2 | 1.6% | 13,179 |
| 2019 | 6.8 | 1.0% | 15,086 |
| 2020 | 13.1 | 1.9% | 12,253 |
| 2021 | 56.3 | 6.6% | 8,768 |
| 2022 | 75.9 | 7.8% | 9,085 |
| 2023 | 72.1 | 7.4% | 9,333 |
| 2024 | 70 | 7.1% | 9,171 |
| 2025 | 109.3 | 11.2% | 8,928 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo6,185 MMBtu
Last month with liquid burnDec 2025
Switch while operatingYes
Net summer MW on gas57
Net summer MW on oil57
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 |
|---|---|---|---|---|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | GT | 27 | 29.2 | Jul 1973 | Operating | — | coming soon |
| GT2 | Natural Gas Fired Combustion Turbine | GT | 35.3 | 27.4 | Jun 1975 | Operating | — | coming soon |
| R1 | Natural Gas Internal Combustion Engine | IC | 18.8 | 18.4 | Apr 2021 | Operating | — | coming soon |
| R2 | Natural Gas Internal Combustion Engine | IC | 18.8 | 18.4 | Apr 2021 | Operating | — | coming soon |
| R3 | Natural Gas Internal Combustion Engine | IC | 18.8 | 18.4 | Apr 2021 | Operating | — | coming soon |
| 1 | Natural Gas Fired Combined Cycle | CA | 7.5 | 6.5 | Mar 1951 | Retired Jan 2021 | — | coming soon |
| 2 | Natural Gas Fired Combined Cycle | CA | 7.5 | 6.5 | Mar 1951 | Retired Jan 2021 | — | coming soon |
| 3 | Natural Gas Fired Combined Cycle | CA | 7.5 | 7 | Oct 1957 | Retired Jan 2021 | — | coming soon |
| IC1 | Petroleum Liquids | IC | 1 | 1.1 | Nov 1948 | Retired Jan 2007 | — | coming soon |
| IC2 | Petroleum Liquids | IC | 1 | 1.1 | Nov 1948 | Retired Jan 2007 | — | coming soon |
| IC4 | Petroleum Liquids | IC | 1 | 1 | Nov 1948 | Retired Jan 2007 | — | coming soon |
| IC5 | Petroleum Liquids | IC | 1 | 1 | Nov 1948 | Retired Jan 2007 | — | coming soon |
Owner / operator
Operator: Central Iowa Power Cooperative. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Central Iowa Power Cooperative | 100.0% | 119 MW |
Nearby plants
Within 80 km.
| Creston School Customer Hosted Solar | 1 MW | 5 km |
| Creston Solar (50 MW) | 50 MW | 5.3 km |
| Southern Hills Wind Farm | 254 MW | 10 km |
| Orient Wind Farm | 501 MW | 11.5 km |
| Cumberland Rose | 2 MW | 14.6 km |
| Bulldog | 2 MW | 14.7 km |