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United States › Power plants › Gas power plants › Maryland

GAS POWER PLANTS · OIL-FIRED POWER PLANTS

Perryman

Perryman is a 492 MW operating power plant in Harford County, Maryland, operated by Constellation Power Source Generation, LLC.

Plant statusOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. OperatingJan 1972 (current stage)
  5. ClosedFeb 2016 (not yet reached)

This plant has generators at more than one stage; see the table below.

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Generators

Each generating unit EIA lists at this plant.

UnitTechnologyCapacityStatusOnlineRetired / planned retirement
GT5Natural Gas Fired Combustion Turbine192 MW OperatingJun 1995
GT6Natural Gas Fired Combustion Turbine141 MW OperatingJun 2015
GT1Petroleum Liquids53 MW OperatingJan 1972
GT3Petroleum Liquids53 MW OperatingApr 1972
GT4Petroleum Liquids53 MW OperatingApr 1972
GT2Petroleum Liquids53 MW RetiredApr 1972Feb 2016

Plant details

Operator
Constellation Power Source Generation, LLC
Location
Harford County, Maryland
Balancing authority
PJM
Sector
IPP Non-CHP
Capacity
Operating: 492 MW
Retired: 53.1 MW
First unit online
Jan 1972
EIA plant ID
1556

Location

39.4428, -76.2218

Nearby power plants

Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem