Effingham County Power Project
Effingham County, Georgia · EIA plant ID 55406 · Operator: Oglethorpe Power Corporation
Nameplate597MWSummer 525 MW
Generators3in service
Net generation3,355GWh12 mo to Aug 2026
Capacity factor73%gas/coal/oil units, summer MW
Heat rate6,999Btu/kWhfossil units, electric fuel, HHV
First online2003Runs 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) |
|---|---|---|---|
| 2002 | 0 | — | — |
| 2003 | 49.2 | 2.7% | 11,546 |
| 2004 | 630.3 | 16.0% | 7,390 |
| 2005 | 875.5 | 22.2% | 7,208 |
| 2006 | 852 | 21.6% | 7,146 |
| 2007 | 1,160.1 | 28.6% | 7,172 |
| 2008 | 1,087.7 | 26.7% | 7,090 |
| 2009 | 2,431.4 | 59.9% | 7,114 |
| 2010 | 2,120.2 | 52.2% | 7,225 |
| 2011 | 2,097.9 | 47.0% | 7,159 |
| 2012 | 2,399.3 | 53.7% | 7,181 |
| 2013 | 1,216.2 | 27.3% | 7,237 |
| 2014 | 1,448.3 | 32.5% | 7,345 |
| 2015 | 2,715.1 | 60.9% | 7,322 |
| 2016 | 1,820.1 | 40.7% | 7,085 |
| 2017 | 2,448.1 | 54.9% | 7,145 |
| 2018 | 1,808 | 40.6% | 7,268 |
| 2019 | 2,135 | 47.4% | 7,266 |
| 2020 | 2,863.2 | 63.4% | 7,162 |
| 2021 | 2,694.6 | 59.9% | 7,084 |
| 2022 | 2,544.6 | 56.5% | 7,087 |
| 2023 | 2,439.6 | 54.2% | 7,146 |
| 2024 | 1,650.3 | 35.3% | 7,159 |
| 2025 | 3,193.4 | 69.5% | 7,031 |
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 |
|---|---|---|---|---|---|---|---|---|
| STG | Natural Gas Fired Combined Cycle | CA | 197.8 | 178.8 | Aug 2003 | Operating | — | coming soon |
| UNT1 | Natural Gas Fired Combined Cycle | CT | 199.4 | 172.9 | Aug 2003 | Operating | — | coming soon |
| UNT2 | Natural Gas Fired Combined Cycle | CT | 199.4 | 172.9 | Aug 2003 | Operating | — | coming soon |
| UNT3 | — | CA | 195.5 | 175.4 | planned Jun 2003 | not_current | — | coming soon |
Owner / operator
Operator: Oglethorpe Power Corporation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Oglethorpe Power Corporation | 100.0% | 597 MW |
Nearby plants
Within 80 km.
| Rincon Solar I | 18 MW | 1.7 km |
| Savannah River Mill | 140 MW | 9.8 km |
| McIntosh Combined Cycle Facility | 1,377 MW | 12.4 km |
| McIntosh Solar | 10 MW | 13.4 km |
| McIntosh | 810 MW | 14 km |
| IKEA Savannah 490 | 2 MW | 15.2 km |