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30 MW Natural Gas operating in Duval, FL — JEA
30 MW
Nameplate Capacity
1
Generators
unit
Natural Gas Steam Turbine
Technology
1957
Operating Since
Coordinates
30.4221, -81.6048
County
Duval, FL
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | WestRock Seminole | — | — |
| Owner(s) | WestRock Seminole | — | — |
| Status | Operating | — | — |
Seminole Mill is a 30 MW natural gas-fired power plant located in Duval County, Florida. The plant began operating in 1957 and is owned and operated by WestRock Seminole. It utilizes a single natural gas steam turbine generator. Seminole Mill operates within the JEA balancing authority and is part of the SERC NERC region.
In the most recent year with available data, Seminole Mill generated 138,720 MWh of electricity, achieving a capacity factor of 52.6%. The plant is ranked as the 56th largest in Florida out of 68 plants, and nationally it is ranked 1236 out of 1963 plants.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
12.0K MWh
Latest Month
138.7K MWh
Annual Generation
52.6%
Capacity Factor
CO₂ Intensity
638 lb/MWh
NOx
0.380 lb/MWh
SO₂
2013
$965/kW
Est. Construction Cost
Total estimated cost: $29.0M
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 Seminole MillJEA (JEA)
Grid Voltage
138.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Commercial
Sector
Industrial CHP
0.003 lb/MWh
CH₄
0.012 lb/MWh
N₂O
0.001 lb/MWh
Capacity Factor
49.0%
Annual Net Gen
129 GWh
CO₂eq
639 lb/MWh
Subregion
FRCC All