In New Castle County, Delaware (DE). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

How big is Edge Moor?

710 MW of nameplate capacity across 4 units, as of the EIA-860M release for 2026-07.

EIA-860M names Calpine Mid-Atlantic Generation LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Edge Moor LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Calpine Mid-Atlantic Generation LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Edge Moor LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Edge Moor still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Edge Moor

Edge Moor is a 710 MW natural gas power plant in New Castle County, Delaware, operated by Calpine Mid-Atlantic Generation LLC. EIA-860M lists 4 generating units here, inside PJM. Its units entered service between 1954 and 1973.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 710.3 MW; 707 MW net summer
Generating units: 4
In service: 1954–1973
EIA plant ID: 593

Where it is

Loading map…

County: New Castle County, Delaware
Coordinates: 39.7389, -75.5038
Balancing authority: PJM
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Calpine Mid-Atlantic Generation LLC
Primary energy source: Natural gas
Technologies: Natural Gas Steam Turbine, Petroleum Liquids
Status: Operating (3) · Standby/Backup (1)

This site runs on more than one energy source. EIA-860M capacity splits: Natural gas 698 MW, Petroleum 13 MW. It is filed here under Natural gas, the source with the most capacity.

Every plant Calpine Mid-Atlantic Generation LLC reports to EIA →

Edge Moor: FAQ

Where is Edge Moor?: In New Castle County, Delaware (DE). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Edge Moor?: 710 MW of nameplate capacity across 4 units, as of the EIA-860M release for 2026-07.
Who owns Edge Moor?: EIA-860M names Calpine Mid-Atlantic Generation LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Edge Moor LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Calpine Mid-Atlantic Generation LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Edge Moor LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Edge Moor still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.