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2848.4 MW Natural Gas Fired Combined Cycle (2765 MW) + Petroleum Liquids (84 MW) operating in Cobb, GA — Southern Company Services, Inc. - Trans
2,848.4 MW
Nameplate Capacity
11
Generators
units
Hybrid (2)
Technology
Natural Gas Fired Combined Cycle + Petroleum Liquids
1971
Operating Since
Coordinates
33.8239, -84.4758
County
Cobb, GA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Georgia Power Co | Georgia Power | Georgia Power |
| Owner(s) | Georgia Power Co | Southern | — |
| Status | Operating | — | — |
The Jack McDonough plant, located in Cobb County, Georgia, is a natural gas-fired combined cycle facility with a total capacity of 2848.4 MW across 11 generators. It also has the capability to use petroleum liquids. The plant began operating in 1971 and is owned by Southern Company and operated by Georgia Power Co. It is a hybrid plant and operates within the Southern Company Services, Inc. - Trans balancing authority, within the SERC NERC region.
Jack McDonough is a significant power producer in Georgia, ranking as the largest of 26 plants in the state based on capacity, and 10th nationally out of 945 plants. The plant's latest annual generation was 17,461,773 MWh, achieving a capacity factor of 70.0%.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Southern Company Services, Inc. - Trans (SOCO)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
1.7M MWh
Latest Month
17.5M MWh
Annual Generation
70.0%
Capacity Factor
CO₂ Intensity
799 lb/MWh
NOx
0.053 lb/MWh
SO₂
0.004 lb/MWh
CH₄
0.015 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
71.4%
Annual Net Gen
17825 GWh
CO₂eq
800 lb/MWh
Subregion
SERC South
2013
$765/kW
Est. Construction Cost
Total estimated cost: $2.2B
This plant's balancing authority participates in the Southeast Energy Exchange Market (SEEM). SEEM is a bilateral exchange — no public nodal pricing.
Last updated 2026-03-26
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