Power plant · EIA plant code 50846
Atlantic Alumina, Gramercy Operations
- Operator
- Atalco Gramercy LLC
- Location
- St James, LA (county level only)
- Balancing authority
- Midcontinent Independent Transmission System Operator, Inc.. (MISO)
- Nameplate capacity
- 85.3 MW
- Summer capacity
- 76 MW
U.S. Energy Information Administration · Annual Electric Generator Report (Form EIA-860) · data for 2025 · as of Sep 10, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Sep 10, 2027. Last checked for an update: Oct 31, 2026.
Generation in 2025
- Net generation
- 180,696 MWh
- Capacity factor
- 24.2%
Capacity factor is net generation divided by nameplate capacity times the hours each generator was in service that year, counted by month.
U.S. Energy Information Administration · Power Plant Operations Report (Form EIA-923) · data for 2025 · as of Sep 11, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Sep 11, 2027. Last checked for an update: Oct 31, 2026.
Emissions
- Carbon dioxide in 2023
- 74,464 metric tons
- Carbon dioxide per MWh
- 710 lb/MWh
eGRID reports 82,083 short tons. One short ton is 0.90718474 metric tons.
Emissions are for 2023, the newest eGRID year. Generation is for 2025, the newest EIA-923 year.
U.S. Environmental Protection Agency · Emissions & Generation Resource Integrated Database (eGRID) · data for 2023 · as of Jun 16, 2025 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Jan 31, 2026. Last checked for an update: Oct 31, 2026.
Generators
| Generator | Technology | Energy source | Nameplate | Operating since | Status |
|---|---|---|---|---|---|
| GT3 | Natural Gas Fired Combustion Turbine | NG | 16 MW | 1969 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| GT4 | Natural Gas Fired Combustion Turbine | NG | 24.7 MW | 1974 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| ST1 | Natural Gas Steam Turbine | NG | 18.7 MW | 1958 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| ST2 | Natural Gas Steam Turbine | NG | 18.7 MW | 1958 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| ST3 | Natural Gas Steam Turbine | NG | 7.2 MW | 1969 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
U.S. Energy Information Administration · Monthly Update to the Annual Electric Generator Report (Form EIA-860M) · data for 2026-09 · as of Oct 23, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Nov 23, 2026. Last checked for an update: Oct 31, 2026.