Cleanview

Hydro power plants in Maryland

Maryland has 2 operating hydro power plants with 0.6 GW of capacity.

  • Operating2
BaltimoreFrederickHagerstownSalisbury

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

The largest hydro power plants in Maryland

Operating, by capacity

#Hydro power plantYear onlineCapacity
1Conowingo1964531 MW
2Deep Creek192520 MW

Hydro power plants that came online most recently in Maryland

Newest first

#Hydro power plantYear onlineCapacity
1Conowingo1964531 MW
2Deep Creek192520 MW
The developer behind each project is on paid plans. See plans

How Cleanview tracks hydro power plants

Operating hydro power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about hydro power plants in Maryland

How many hydro power plants are in Maryland?
Maryland has 2 operating utility-scale hydro power plants with 0.6 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest hydro power plant in Maryland?
Conowingo in Harford County, Maryland is the largest, at 531 MW. It came online in 1964.
How many hydro power plants were built in Maryland in 2025?
0 hydro power plants came online in Maryland in 2025, with 0 MW of capacity.
Who is developing hydro power plants in Maryland?
Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

More energy trackers for Maryland

Hydro power plants in other states

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