United States › Power plants › Hydroelectric plants › Maryland
HYDROELECTRIC PLANTSConowingo
Conowingo is a 531 MW operating hydroelectric plant in Harford County, Maryland, operated by Constellation Power, Inc.
Generators
Each generating unit EIA lists at this plant.
| Unit | Technology | Capacity | Status |
|---|---|---|---|
| 8 | Conventional Hydroelectric | 56 MW | |
| 9 | Conventional Hydroelectric | 56 MW | |
| 10 | Conventional Hydroelectric | 56 MW | |
| 11 | Conventional Hydroelectric | 56 MW | |
| 3 | Conventional Hydroelectric | 48 MW | |
| 7 | Conventional Hydroelectric | 48 MW | |
| 4 | Conventional Hydroelectric | 48 MW | |
| 6 | Conventional Hydroelectric | 48 MW | |
| 1 | Conventional Hydroelectric | 45 MW | |
| 2 | Conventional Hydroelectric | 36 MW | |
| 5 | Conventional Hydroelectric | 36 MW |
Plant details
- Operator
- Constellation Power, Inc
- Location
- Harford County, Maryland
- Balancing authority
- PJM
- Sector
- IPP Non-CHP
- Capacity
- Operating: 531 MW
- First unit online
- Mar 1928
- EIA plant ID
- 1574
Location
39.6572, -76.1752
Nearby power plants
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- APG New ChesapeakeSolar farms · 2.3 MW · 11.4 mi
- Muddy RunHydroelectric plants · 1,072 MW · 12.3 mi
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