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2822 MW Sub. Coal operating in Jefferson, AL — Southern Company Services, Inc. - Trans
2,822 MW
Nameplate Capacity
4
Generators
units
Conventional Steam Coal
Technology
1978
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Alabama Power Co | PowerSouth Energy Cooperative | — |
| Owner(s) | Alabama Power Co, PowerSouth Energy Cooperative | Southern | Alabama Power |
| Status | Operating | — | — |
James H. Miller Jr. Electric Generating Plant, also known as Miller Steam Plant or Plant Miller, is a coal-fired electrical generation facility sitting on approximately 800 acres (320 ha) in West Jefferson, Alabama. It is owned by Alabama Power, a subsidiary of Southern Company.
Read more on WikipediaThe James H Miller Jr plant is a 2,822 MW coal-fired power plant located in Jefferson County, Alabama. It began operating in 1978 and is owned by Southern Company and operated by Alabama Power Co. The plant utilizes conventional steam coal technology with subbituminous coal (SUB) as its primary fuel source. It consists of four generators.
The plant is the largest in Alabama and ranks first out of 75 coal plants nationally. It operates within the Southern Company Services, Inc. - Trans balancing authority and the SERC NERC region. The latest annual generation data indicates an output of 19,017,972 MWh, achieving a capacity factor of 76.9%. Financial data indicates an installed cost of $1270.72 per kW, according to FERC filings.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
1.5M MWh
Latest Month
19.0M MWh
Annual Generation
76.9%
Capacity Factor
CO₂ Intensity
2286 lb/MWh
NOx
0.717 lb/MWh
SO₂
Steam turbine · ALABAMA POWER COMPANY · Data from 2015–2024
$1,776/kW
Installed Cost
$11/kW
Annual CapEx
$32.3/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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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ask pi about James H Miller JrSouthern Company Services, Inc. - Trans (SOCO)
Grid Voltage
500.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
0.098 lb/MWh
CH₄
0.249 lb/MWh
N₂O
0.036 lb/MWh
Capacity Factor
64.1%
Annual Net Gen
15846 GWh
CO₂eq
2302 lb/MWh
Subregion
SERC South