Moselle
Jones County, Mississippi · EIA plant ID 2070 · Operator: South Mississippi El Pwr Assn
Nameplate511MWSummer 477 MW
Generators7in service
Net generation1,577GWh12 mo to Aug 2026
Capacity factor38%gas/coal/oil units, summer MW
Heat rate8,908Btu/kWhfossil units, electric fuel, HHV
First online1970Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 399.8 | — | — |
| 2002 | 474.7 | — | — |
| 2003 | 401.9 | 17.6% | 12,111 |
| 2004 | 394.7 | 17.8% | 12,563 |
| 2005 | 310 | 14.0% | 12,448 |
| 2006 | 342.4 | 13.2% | 12,435 |
| 2007 | 267.5 | 9.3% | 12,455 |
| 2008 | 123.7 | 4.3% | 12,846 |
| 2009 | 207 | 7.2% | 12,495 |
| 2010 | 264 | 9.2% | 12,373 |
| 2011 | 272.4 | 9.5% | 12,185 |
| 2012 | 782.7 | 22.9% | 8,890 |
| 2013 | 951 | 22.8% | 8,392 |
| 2014 | 888.5 | 21.3% | 8,610 |
| 2015 | 1,532.6 | 36.7% | 8,483 |
| 2016 | 1,541 | 36.8% | 8,529 |
| 2017 | 912.4 | 21.8% | 8,864 |
| 2018 | 968.5 | 23.2% | 9,210 |
| 2019 | 1,234 | 29.5% | 8,601 |
| 2020 | 1,643.2 | 39.2% | 8,520 |
| 2021 | 1,314.5 | 31.5% | 8,661 |
| 2022 | 1,222.5 | 29.3% | 8,897 |
| 2023 | 2,141.8 | 51.3% | 8,892 |
| 2024 | 2,009.3 | 48.0% | 8,985 |
| 2025 | 1,659.3 | 39.7% | 8,842 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusListed in EIA-860, no liquid burn in 36 months
Liquid fuel burned · 36 mo0 MMBtu
Last month with liquid burn—
Switch while operatingYes
Net summer MW on gas75
Net summer MW on oil75
Time gas → oilup to 6 h (EIA 6H)
Time oil → gasup to 6 h (EIA 6H)
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Natural Gas Fired Combined Cycle | CA | 59 | 59 | Aug 1970 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combined Cycle | CA | 59 | 59 | Aug 1970 | Operating | — | coming soon |
| 3 | Natural Gas Steam Turbine | ST | 59 | 59 | Aug 1970 | Operating | — | coming soon |
| 4 | Natural Gas Fired Combustion Turbine | GT | 83 | 75 | Jun 1997 | Operating | — | coming soon |
| 5 | Natural Gas Fired Combustion Turbine | GT | 83.5 | 75 | Jun 2006 | Operating | — | coming soon |
| GTG1 | Natural Gas Fired Combined Cycle | CT | 83.5 | 75 | May 2012 | Operating | — | coming soon |
| GTG2 | Natural Gas Fired Combined Cycle | CT | 83.5 | 75 | Nov 2012 | Operating | — | coming soon |
Owner / operator
Operator: South Mississippi El Pwr Assn. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| South Mississippi El Pwr Assn | 100.0% | 511 MW |
Nearby plants
Within 80 km.
| OE_MS4 | — | 20 km |
| Sumrall II Solar Farm | 52 MW | 22.8 km |
| Sumrall I Solar Farm | 52 MW | 23.3 km |
| Hattiesburg Solar Farm | 50 MW | 28 km |
| R D Morrow | 558 MW | 35.5 km |
| Georgia-Pacific Taylorsville Plywood | 7 MW | 37.7 km |