Edge Moor
New Castle County, Delaware · EIA plant ID 593 · Operator: Calpine Mid-Atlantic Generation LLC
Nameplate710MWSummer 707 MW
Generators4in service
Net generation391GWh12 mo to Dec 2025
Capacity factor3%gas/coal/oil units, summer MW
Heat rate13,062Btu/kWhfossil units, electric fuel, HHV
First online1954Runs 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 | 2,598.5 | — | — |
| 2002 | 1,911.8 | — | — |
| 2003 | 2,400 | 38.2% | 10,728 |
| 2004 | 1,828.4 | 29.0% | 11,244 |
| 2005 | 1,762.1 | 28.0% | 11,440 |
| 2006 | 1,538.8 | 24.5% | 10,958 |
| 2007 | 1,815.3 | 28.7% | 10,776 |
| 2008 | 1,471.1 | 21.6% | 10,979 |
| 2009 | 582.1 | 7.9% | 12,082 |
| 2010 | 652.7 | 8.9% | 12,087 |
| 2011 | 657 | 9.1% | 12,150 |
| 2012 | 1,075.6 | 16.3% | 11,346 |
| 2013 | 395.6 | 6.2% | 11,956 |
| 2014 | 852.3 | 13.4% | 11,702 |
| 2015 | 585.6 | 9.2% | 11,930 |
| 2016 | 865.2 | 13.6% | 11,509 |
| 2017 | 232.1 | 3.7% | 12,051 |
| 2018 | 313 | 4.9% | 11,606 |
| 2019 | 137.8 | 2.2% | 13,011 |
| 2020 | 175.5 | 2.8% | 11,777 |
| 2021 | 292.5 | 4.6% | 12,004 |
| 2022 | 339.9 | 5.3% | 12,385 |
| 2023 | 222.3 | 3.6% | 12,972 |
| 2024 | 327.6 | 5.3% | 12,380 |
| 2025 | 391.3 | 6.3% | 13,062 |
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 |
|---|---|---|---|---|---|---|---|---|
| 10 | Petroleum Liquids | GT | 12.5 | 12 | Jun 1963 | Operating (Standby / backup) | — | coming soon |
| 3 | Natural Gas Steam Turbine | ST | 75 | 86 | Dec 1954 | Operating | — | coming soon |
| 4 | Natural Gas Steam Turbine | ST | 176.8 | 171 | Apr 1966 | Operating | — | coming soon |
| 5 | Natural Gas Steam Turbine | ST | 446 | 438 | Aug 1973 | Operating | — | coming soon |
| EM10 | Petroleum Liquids | GT | 12.5 | 13 | Jun 1963 | not_current | — | coming soon |
| EM3 | Conventional Steam Coal | ST | 75 | 86 | Dec 1954 | not_current | — | coming soon |
| EM4 | Conventional Steam Coal | ST | 176.8 | 174 | Apr 1966 | not_current | — | coming soon |
| EM5 | Petroleum Liquids | ST | 446 | 444 | Aug 1973 | not_current | — | coming soon |
Owner / operator
Operator: Calpine Mid-Atlantic Generation LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Calpine Mid-Atlantic Generation LLC | 100.0% | 710 MW |
Nearby plants
Within 80 km.
| Hay Road | 1,098 MW | 0.6 km |
| DD Hay Road Solar 23 LLC | 1 MW | 0.7 km |
| Christiana | 55 MW | 3 km |
| WHA Southbridge Solar Park CSG | 1 MW | 4 km |
| Chambers Cogeneration LP | retired | 5.3 km |
| Croda Atlas Point CHP | 4 MW | 6.1 km |