Edge Moor
Natural gas power plant · New Castle County, Delaware
Nameplate capacity
710 MW
Rank in Delaware
#2
of 39 plants
In service since
1954
December 1954
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Steam Turbine
- Operator
- Calpine Mid-Atlantic Generation LLC
- County
- New Castle County
- Generating units
- 4
- Share of state capacity
- 23.48%
- Rank among natural gas plants in Delaware
- #2 of 10
- EIA plant code
- 593
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 5 | Natural Gas Steam Turbine | 446 MW | 438 MW | 1973 | Operating |
| 4 | Natural Gas Steam Turbine | 177 MW | 171 MW | 1966 | Operating |
| 3 | Natural Gas Steam Turbine | 75 MW | 86 MW | 1954 | Operating |
| 10 | Petroleum Liquids | 13 MW | 12 MW | 1963 | Standby/Backup: available for service but not normally used |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Delaware
| Hay Road | Natural gas | 1,098 MW |
| Garrison Energy Center LLC | Natural gas | 361 MW |
| Delaware City Plant | Natural gas | 324 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 710 MW solar plant and a 710 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Delaware power plants · What Delaware actually generates