Stock Island
Monroe County, Florida · EIA plant ID 6584 · Operator: Utility Board of Key West City
Nameplate126MWSummer 115 MW
Generators7in service
Net generation7GWh12 mo to Dec 2025
Capacity factor1%gas/coal/oil units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1978Runs 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), 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 | 2.8 | — | — |
| 2002 | 1.1 | — | — |
| 2003 | 17.7 | 2.6% | 15,865 |
| 2004 | 14.4 | 2.1% | 14,303 |
| 2005 | 12.7 | 1.8% | 15,895 |
| 2006 | 17.5 | 2.0% | 12,696 |
| 2007 | 19.7 | 1.9% | 13,033 |
| 2008 | 7.5 | 0.7% | 13,674 |
| 2009 | 8.7 | 0.9% | 12,482 |
| 2010 | 9.4 | 1.0% | 14,114 |
| 2011 | 5.4 | 0.5% | 12,539 |
| 2012 | 1.5 | 0.1% | 13,460 |
| 2013 | 1.8 | 0.2% | 15,740 |
| 2014 | 3.1 | 0.3% | 15,112 |
| 2015 | 3.6 | 0.4% | 5,319 |
| 2016 | 1.3 | 0.1% | 11,978 |
| 2017 | 1.4 | 0.1% | 12,993 |
| 2018 | 2.1 | 0.2% | 13,937 |
| 2019 | 2.7 | 0.3% | 14,167 |
| 2020 | 3.2 | 0.3% | 13,241 |
| 2021 | 3.5 | 0.4% | 12,952 |
| 2022 | 7.2 | 0.7% | 13,914 |
| 2023 | 3 | 0.3% | 12,729 |
| 2024 | 3.4 | 0.3% | 13,535 |
| 2025 | 7 | 0.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| EP2 | Petroleum Liquids | IC | 2.5 | 2.5 | Jun 2012 | Operating | — | coming soon |
| GT1 | Petroleum Liquids | GT | 23.4 | 19 | Nov 1978 | Operating | — | coming soon |
| GT2 | Petroleum Liquids | GT | 19.7 | 17 | Sep 1999 | Operating | — | coming soon |
| GT3 | Petroleum Liquids | GT | 19.7 | 17 | Sep 1999 | Operating | — | coming soon |
| GT4 | Petroleum Liquids | GT | 42 | 44 | Jun 2006 | Operating | — | coming soon |
| MSD1 | Petroleum Liquids | IC | 9.6 | 7.5 | Jun 1991 | Operating | — | coming soon |
| MSD2 | Petroleum Liquids | IC | 9.6 | 7.5 | Jun 1991 | Operating | — | coming soon |
| IC1 | Petroleum Liquids | IC | 2.5 | 1.5 | Jan 1965 | Retired Dec 2009 | — | coming soon |
| IC2 | Petroleum Liquids | IC | 2.5 | 1.5 | Jan 1965 | Retired Dec 2009 | — | coming soon |
| IC3 | Petroleum Liquids | IC | 2.5 | 1.5 | Jan 1965 | Retired Dec 2009 | — | coming soon |
Owner / operator
Operator: Utility Board of Key West City. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Florida Municipal Power Agency (FL) | 100.0% | 127 MW |
Nearby plants
Within 80 km.
| Marathon Generating Plant | retired | 66.9 km |