Philadelphia
Other power plant · Baltimore City County, Maryland
Nameplate capacity
83 MW
Rank in Maryland
#18
of 234 plants
In service since
1970
August 1970
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- Constellation Power Source Generation, LLC
- County
- Baltimore City County
- Generating units
- 4
- Share of state capacity
- 0.62%
- Rank among other plants in Maryland
- #5 of 19
- EIA plant code
- 1557
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GT1 | Petroleum Liquids | 21 MW | 15 MW | 1970 | Operating |
| GT2 | Petroleum Liquids | 21 MW | 15 MW | 1970 | Operating |
| GT3 | Petroleum Liquids | 21 MW | 15 MW | 1970 | Operating |
| GT4 | Petroleum Liquids | 21 MW | 15 MW | 1970 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Maryland
| Great Bay Solar 1 | Solar | 118 MW |
| NRG Chalk Point CT | Other | 94 MW |
| Criterion | Wind | 70 MW |
| Montgomery County Resource Recovery | Other | 68 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 83 MW solar plant and a 83 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Maryland power plants · What Maryland actually generates