74.4 MW Distillate Oil operating in Philadelphia, PA — PJM Interconnection, LLC
74.4 MW
Nameplate Capacity
4
Generators
units
Petroleum Liquids
Technology
1967
Operating Since
Coordinates
39.9142, -75.1353
County
Philadelphia, PA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Constellation Power, Inc | Constellation Power | — |
| Owner(s) | Constellation Power, Inc | Constellation Energy | — |
| Status | Operating | — | — |
The Southwark plant is a 74.4 MW petroleum liquid-fueled power plant located in Philadelphia County, Pennsylvania. The plant began operating in 1967 and consists of 4 generators utilizing petroleum liquids technology. It is owned by Constellation Energy and operated by Constellation Power, Inc.
Southwark operates within the PJM Interconnection, LLC balancing authority and the RFC NERC region. In the most recent year with available data, the plant generated 119 MWh, resulting in a capacity factor of 0.0%. Southwark ranks as the 8th largest petroleum-fueled plant out of 31 in Pennsylvania, and 76th out of 886 nationally.
Generated from EIA, GEM, and public data sources
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC
Grid Voltage
69 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
9 MWh
Latest Month
119 MWh
Annual Generation
0.0%
Capacity Factor
No financial data available for this plant.
Point of Interconnection
Nearest Substation
Southwark Substation · 69 kV
Substation Distance
< 10 km
Operator
PECO
Coord Source
OSM spatial
Market Position
ISO/RTO Market
PJM
LMP Node
SWARK 13 KV UNIT3
Pricing Hub
WESTERN HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
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Last updated 2026-03-25
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