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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
ISO/RTO
PJM
Market
ISO/RTO Member
NERC Region
RFC
Balancing Authority
9 MWh
Latest Month
119 MWh
Annual Generation
0.0%
Capacity Factor
CO₂ Intensity
3633 lb/MWh
Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.
NOx
20 lb/MWh
SO₂
2013
$765/kW
Est. Construction Cost
Total estimated cost: $56.9M
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
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about SouthwarkPJM Interconnection, LLC (PJM)
Grid Voltage
69.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
11 lb/MWh
CH₄
0.147 lb/MWh
N₂O
0.029 lb/MWh
Capacity Factor
0.0%
Annual Net Gen
0 GWh
CO₂eq
3645 lb/MWh
Subregion
RFC East