MMSD Jones Island Wastewater
Milwaukee County, Wisconsin · EIA plant ID 54851 · Operator: Milwaukee Metro Sewerage Dist
Nameplate31MWSummer 27 MW
Generators4in service
Net generation82GWh12 mo to Aug 2026
Capacity factor47%gas/coal/oil units, summer MW
Heat rate5,210Btu/kWhfossil units, electric fuel, HHV
First online1971Runs as intermediate
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 | 60.5 | 26.6% | 6,362 |
| 2002 | 70.8 | 31.1% | 4,887 |
| 2003 | 61.4 | 27.0% | 23,356 |
| 2004 | 73 | 32.0% | 6,221 |
| 2005 | 67.7 | 29.7% | 6,221 |
| 2006 | 50.5 | 22.2% | 6,221 |
| 2007 | 57.2 | 25.1% | 6,221 |
| 2008 | 35.9 | 15.7% | 6,387 |
| 2009 | 60.5 | 26.6% | 6,269 |
| 2010 | 49.3 | 21.6% | 6,273 |
| 2011 | 70.8 | 31.1% | 6,276 |
| 2012 | 38 | 16.7% | 6,276 |
| 2013 | 68.6 | 37.6% | 6,195 |
| 2014 | 79.8 | 46.5% | 6,181 |
| 2015 | 84.9 | 58.4% | 6,176 |
| 2016 | 90.9 | 67.1% | 5,161 |
| 2017 | 79.5 | 38.1% | 5,249 |
| 2018 | 89.9 | 54.3% | 5,233 |
| 2019 | 88.7 | 50.4% | 5,233 |
| 2020 | 90.4 | 41.0% | 5,236 |
| 2021 | 81.3 | 38.3% | 5,256 |
| 2022 | 81 | 35.4% | 5,254 |
| 2023 | 75.8 | 34.2% | 5,210 |
| 2024 | 55.2 | 30.2% | 5,271 |
| 2025 | 79.8 | 42.2% | 5,228 |
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.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo11,001 MMBtu
Last month with liquid burnSep 2025
Switch while operatingYes
Net summer MW on gas13
Net summer MW on oil13
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combustion Turbine | GT | 17.5 | 13 | Jan 1971 | Operating | — | coming soon |
| SOL1 | Natural Gas Fired Combustion Turbine | GT | 4.6 | 4.6 | Jan 2013 | Operating | — | coming soon |
| SOL2 | Landfill Gas | GT | 4.6 | 4.6 | Jan 2013 | Operating | — | coming soon |
| SOL3 | Landfill Gas | GT | 4.6 | 4.6 | Jan 2013 | Operating | — | coming soon |
| GEN2 | Natural Gas Fired Combustion Turbine | GT | 17.5 | 13 | Jan 1971 | Retired Jul 2013 | — | coming soon |
Owner / operator
Operator: Milwaukee Metro Sewerage Dist. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Milwaukee Metro Sewerage Dist | 100.0% | 31 MW |
Nearby plants
Within 80 km.
| Valley (WI) | 275 MW | 2 km |
| FCPC Renewable Generation | retired | 3.4 km |
| ATI | 2 MW | 9.2 km |
| City of Milwaukee Landfill | 2 MW | 9.8 km |
| City of Milwaukee- Airport Expansion | — | 10.2 km |
| IKEA Oak Creek Rooftop PV System | 1 MW | 13.5 km |