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Hydroelectric power plants in Maryland

2 operating hydroelectric power plants in Maryland with 551 MW of hydroelectric capacity, largest first. From EIA-860M, August 2026.

Plants

2

Hydroelectric capacity

551 MW

Net generation, 2025

1.56 TWh

Largest

Conowingo

531 MW

Largest hydroelectric power plants in Maryland

#PlantHydroelectric MW2025 net generation, GWhGWh, 2025Capacity factorOperator
1ConowingoHarford County5311,54933.3%Constellation Power, Inc
2Deep CreekGarrett County2014.48.2%BP Piney & Deep Creek LLC

Projects where hydroelectric is the largest fuel or at least a fifth of nameplate capacity. MW is hydroelectric nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources

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