Where is Delaware City 10?

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 Delaware City 10?

19 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.

Who owns Delaware City 10?

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 Delaware City 10 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 "Delaware City 10 LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Delaware City 10 still running?

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

Delaware City 10

Delaware City 10 is a 19 MW oil-fired power plant in New Castle County, Delaware, operated by Calpine Mid-Atlantic Generation LLC. EIA-860M lists 1 generating unit here, inside PJM. Its unit entered service in 1968.

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: 18.5 MW; 18 MW net summer
Generating units: 1
In service: 1968
EIA plant ID: 592

Where it is

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County: New Castle County, Delaware
Coordinates: 39.6004, -75.6268
Balancing authority: PJM
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Calpine Mid-Atlantic Generation LLC
Primary energy source: Petroleum
Technologies: Petroleum Liquids
Status: Standby/Backup

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

Delaware City 10: FAQ

Where is Delaware City 10?: 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 Delaware City 10?: 19 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Delaware City 10?: 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 Delaware City 10 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 "Delaware City 10 LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Delaware City 10 still running?: EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.