Sylvarena
Smith County, Mississippi · EIA plant ID 7989 · Operator: South Mississippi El Pwr Assn
Nameplate141MWSummer 129 MW
Generators3in service
Net generation262GWh12 mo to Dec 2025
Capacity factor23%gas/coal/oil units, summer MW
Heat rate10,572Btu/kWhfossil units, electric fuel, HHV
First online2003Runs as intermediate
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) |
|---|---|---|---|
| 2004 | 69.4 | 6.1% | 9,427 |
| 2005 | 110.5 | 9.8% | 10,143 |
| 2006 | 81.9 | 7.2% | 10,410 |
| 2007 | 102.9 | 9.1% | 10,770 |
| 2008 | 71 | 6.3% | 11,194 |
| 2009 | 89.7 | 7.9% | 10,704 |
| 2010 | 101.7 | 9.0% | 10,680 |
| 2011 | 108 | 9.6% | 10,510 |
| 2012 | 43.4 | 3.8% | 15,914 |
| 2013 | 38.7 | 3.4% | 11,131 |
| 2014 | 175.8 | 15.6% | 10,251 |
| 2015 | 180.3 | 16.0% | 10,250 |
| 2016 | 179.1 | 15.8% | 10,104 |
| 2017 | 153.3 | 13.6% | 10,207 |
| 2018 | 253 | 22.4% | 10,216 |
| 2019 | 199.5 | 17.7% | 10,105 |
| 2020 | 214.9 | 19.0% | 10,107 |
| 2021 | 257.4 | 22.8% | 10,118 |
| 2022 | 234.8 | 20.8% | 10,089 |
| 2023 | 280.6 | 24.8% | 10,138 |
| 2024 | 294.3 | 26.0% | 10,275 |
| 2025 | 262.1 | 23.2% | 10,572 |
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 Combustion Turbine | GT | 47 | 43 | Jul 2003 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 47 | 43 | Jul 2003 | Operating | — | coming soon |
| 3 | Natural Gas Fired Combustion Turbine | GT | 47 | 43 | Jul 2003 | 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% | 141 MW |
Nearby plants
Within 80 km.
| Georgia-Pacific Taylorsville Plywood | 7 MW | 16.8 km |
| SR Jasper | — | 44.8 km |
| Cane Creek | 79 MW | 49.5 km |
| Moselle | 511 MW | 51.6 km |
| OE_MS4 | — | 60.7 km |
| Sumrall I Solar Farm | 52 MW | 64.8 km |