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47.4 MW Black Liquor operating in Marengo, AL — Southern Company Services, Inc. - Trans
47.4 MW
Nameplate Capacity
2
Generators
units
Wood/Wood Waste Biomass
Technology
1982
Operating Since
Coordinates
32.4541, -87.9759
County
Marengo, AL
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | WestRock Mill Company, LLC | WestRock Mill Company LLC | — |
| Owner(s) | WestRock Mill Company, LLC | Smurfit Westrock | — |
| Status | Operating | operating | — |
The WestRock Demopolis Mill is a 47.4 MW biomass power plant located in Marengo County, Alabama. The plant began operating in 1982 and is owned by Smurfit Westrock, an Irish company. The operator listed with the EIA is WestRock Mill Company, LLC. The plant utilizes two generators powered by wood and wood waste biomass (BLQ).
In the most recent year of data, the WestRock Demopolis Mill generated 312,959 MWh of electricity, achieving a capacity factor of 75.2%. The balancing authority for the plant is Southern Company Services, Inc. - Trans, and it is located within the SERC NERC region. Among biomass plants in Alabama, it ranks 7th out of 9, and nationally it ranks 52nd out of 66.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
26.4K MWh
Latest Month
313.0K MWh
Annual Generation
75.2%
Capacity Factor
CO₂ Intensity
59 lb/MWh
NOx
0.905 lb/MWh
SO₂
2013
$3,495/kW
Est. Construction Cost
Total estimated cost: $165.7M
This plant's balancing authority participates in the Southeast Energy Exchange Market (SEEM). SEEM is a bilateral exchange — no public nodal pricing.
Last updated 2026-03-14
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ask pi about WestRock Demopolis MillSouthern Company Services, Inc. - Trans (SOCO)
Grid Voltage
115.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Industrial
Sector
Industrial CHP
2 lb/MWh
CH₄
0.150 lb/MWh
N₂O
0.033 lb/MWh
Capacity Factor
70.0%
Annual Net Gen
291 GWh
CO₂eq
72 lb/MWh
Subregion
SERC South