Power Plants in Delaware

Delaware's power sector in numbers

Bywatts maps 22 operating power plants with 3.4 GW of nameplate capacity in Delaware. Natural Gas leads with 48% of that capacity across 4 plants, followed by Coal (48%) and Oil (3%). The inventory also includes 2 plants (151 MW) that EIA-860 lists as retired, the largest being MCKEE RUN (151 MW, retired 2021).

The largest operating plants are HAY ROAD (1,193 MW, Natural Gas, CALPINE MID-ATLANTIC GENERATION LLC), INDIAN RIVER GENERATING STATION (804 MW, Coal, INDIAN RIVER OPERATIONS INC) and EDGE MOOR (710 MW, Coal, CALPINE MID-ATLANTIC GENERATION LLC).

Of the 21 operating plants with a recorded commissioning year, 12 came online in 2000 or later and 9 in 2010 or later; the busiest decade for new capacity was the 1980s (1.3 GW).

The largest operators by operating capacity are CALPINE MID-ATLANTIC GENERATION LLC (5 plants, 2.0 GW), INDIAN RIVER OPERATIONS INC (1 plant, 804 MW) and DELAWARE CITY REFINING COMPANY LLC (1 plant, 324 MW).

Retail electricity sales in Delaware reached 11.6 TWh in 2025, up 0.7% over ten years and up 1.8% year on year; residential customers took 46.0% of it. The average retail price across all sectors was 14.21 cents per kWh, up 27.1% since 2015.

The database also maps 13 named substations (none of the 1 with a recorded voltage is rated 345 kV or above), 2 data centers (operators include American Domain Names and IPR International), 37 solar installers and 13 solar companies in Delaware.

Operating capacity by fuel

Retail electricity sales

Sources: HIFLD power-plant inventory (capacity, fuel, operator), EIA-860 (commissioning year, retirements, operable capacity), EIA retail sales and revenue series through January 2026. Counts are of plants Bywatts lists, not every generator in the state.