Port Washington Generating Station
Natural gas power plant in Ozaukee County, Wisconsin. 1,229.6 MW of nameplate capacity across 6 generators, operated by Wisconsin Electric Power Co.
Also known as EIA plant 4040
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Key facts
- Capacity
- 1,229.6 MWNameplate
- Generators
- 6 operatingEIA-860M, August 2026
- Operating since
- July 2005First generator online
- Operator
- Wisconsin Electric Power CoEIA operator ID 20847
- Grid
- MISOBalancing authority MISO
- Price nodes
- 6 MISO nodesResource nodes with prices
- Location
- Ozaukee County, WI43.3842, −87.8689
- EIA plant ID
- 4040EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Port Washington produces
Free · EIA-923Net generation, 2025
7.26 TWh
7,260,771 MWh, final
Capacity factor, 2025
67.4%
2024: 69.9%
January to July 2026
3.41 TWh
Provisional
Range, 2015 to 2025
4.7–8.5
TWh a year. Low 2015, high 2023
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 1,228,364 | Not reported | 12 of 12 |
| 2001 | 941,117 | Not reported | 12 of 12 |
| 2002 | 747,511 | Not reported | 12 of 12 |
| 2003 | 668,415 | Not reported | 12 of 12 |
| 2004 | 509,152 | Not reported | 8 of 12 |
| 2005 | 511,550 | Not reported | 12 of 12 |
| 2006 | 1,172,922 | Not reported | 12 of 12 |
| 2007 | 1,817,091 | Not reported | 12 of 12 |
| 2008 | 1,732,561 | Not reported | 12 of 12 |
| 2009 | 2,276,384 | Not reported | 12 of 12 |
| 2010 | 2,655,942 | 25.7% | 12 of 12 |
| 2011 | 2,273,443 | 22.0% | 12 of 12 |
| 2012 | 4,961,686 | Not reported | 12 of 12 |
| 2013 | 3,350,793 | Not reported | 12 of 12 |
| 2014 | 2,943,386 | Not reported | 12 of 12 |
| 2015 | 4,747,453 | 44.8% | 12 of 12 |
| 2016 | 5,818,155 | 54.8% | 12 of 12 |
| 2017 | 5,231,862 | 49.4% | 12 of 12 |
| 2018 | 5,829,109 | 55.0% | 12 of 12 |
| 2019 | 7,867,603 | 74.3% | 12 of 12 |
| 2020 | 8,334,433 | 78.5% | 12 of 12 |
| 2021 | 7,039,522 | 66.5% | 12 of 12 |
| 2022 | 7,695,400 | 72.7% | 12 of 12 |
| 2023 | 8,470,420 | Not reported | 12 of 12 |
| 2024 | 7,547,276 | 69.9% | 12 of 12 |
| 2025 | 7,260,771 | 67.4% | 12 of 12 |
| 2026 (provisional, partial year) | 3,408,119 | 54.5% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · MISOEmissions
Free · EPA CAMPDCO₂, 2025
2.97M
US short tons. 2024: 3.10M
SO₂, 2025
15
US short tons
NOx, 2025
268
US short tons
CO₂ per MWh, calculated
0.41 t
About 819 lb per MWh
4 of 4 EPA units reported CO₂ in 2025 (11, 12, 21, 22), matched to EIA plant 4040 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
178,584
million gallons
Consumption, 2024
0
million gallons
Source
Lake Michigan
Surface, Fresh. Once-through
Watershed stress
Low · 0.223
USGS SUI, HUC12 Fox Point-Frontal Lake Michigan
24 of 24 cooling months report withdrawal. Great Lakes intake; a shoreline HUC12 does not describe the lake; not tested. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1CT1 | Natural Gas Fired Combined Cycle | 173.1 | May 2008 |
| 1CT2 | Natural Gas Fired Combined Cycle | 173.1 | May 2008 |
| 2CT1 | Natural Gas Fired Combined Cycle | 173.1 | July 2005 |
| 2CT2 | Natural Gas Fired Combined Cycle | 173.1 | July 2005 |
| ST1 | Natural Gas Fired Combined Cycle | 268.6 | May 2008 |
| ST2 | Natural Gas Fired Combined Cycle | 268.6 | July 2005 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Wisconsin Electric Power Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Port Washington
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Questions about Port Washington
How much power does Port Washington Generating Station produce?
Port Washington Generating Station reported 7,260,771 MWh (7.26 TWh) of net generation in 2025, a 67.4% capacity factor on 1,229.6 MW of nameplate capacity. From January to July 2026 it reported 3.41 TWh, which is provisional.
Where is Port Washington Generating Station?
Port Washington Generating Station is in Ozaukee County, Wisconsin, at 43.3842, −87.8689. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Port Washington Generating Station?
EIA-860M for August 2026 lists Wisconsin Electric Power Co as the operator (EIA operator ID 20847). The operator is not always the owner.
When did Port Washington Generating Station start operating?
Its first generator began operating in July 2005, according to EIA-860M.
Does InfraMap have power prices for Port Washington Generating Station?
Yes. InfraMap has MISO day-ahead and real-time prices at 6 price nodes linked to Port Washington Generating Station, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page