Port Washington Generating Station
Port Washington Generating Station, LLCOzaukee County
A 1,150 MW net natural-gas-fired combined-cycle generating station in Port Washington, Ozaukee County, Wisconsin, on the shore of Lake Michigan. The facility consists of two power blocks, each rated at approximately 575 MW and each containing two GE 7FA.04 combustion-turbine generators, one Alstom heat-recovery steam generator with supplementary duct firing, and one GE D11 steam-turbine generator. The station replaced a 225 MW coal-fired facility that operated at the same site for more than 70 years. The station is owned by Port Washington Generating Station, LLC and operated by Wisconsin Electric Power Company under a 25-year lease structure approved by the Wisconsin Public Service Commission. The project represents a significant repowering and was financed through the state's affiliated leased-generation framework rather than conventional rate-base ownership.
Mapped infrastructure geometry associated with this asset.
EIA plant 4040 · Inventory for Aug 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 1CT1 | Natural Gas Fired Combined Cycle | Operating | 173.1 | Unknown |
| 1CT2 | Natural Gas Fired Combined Cycle | Operating | 173.1 | Unknown |
| 2CT1 | Natural Gas Fired Combined Cycle | Operating | 173.1 | Unknown |
| 2CT2 | Natural Gas Fired Combined Cycle | Operating | 173.1 |
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1CT1 | 173.1 MW 178.2 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | May 2008 | Operating |
| 1CT2 | 173.1 MW 178.8 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | May 2008 | Operating |
| 2CT1 | 173.1 MW 174.8 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 2005 | Operating |
| 2CT2 | 173.1 MW 174.9 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 2005 | Operating |
| ST1 | ||||
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
The Wisconsin Public Service Commission issued a Final Decision (Order) approving the Certificate of Public Convenience and Necessity (CPCN) for construction of two 545-MW natural-gas-fired combined-cycle Port Washington units and the related affiliated leases, asset purchase and sale agreement, natural-gas pipeline, and transmission work.
| Unknown |
| ST1 | Natural Gas Fired Combined Cycle | Operating | 268.6 | Unknown |
|---|
| ST2 | Natural Gas Fired Combined Cycle | Operating | 268.6 | Unknown |
|---|
| 1 | Conventional Steam Coal | Retired | 80 | Unknown |
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| 2 | Conventional Steam Coal | Retired | 80 | Unknown |
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| 3 | Conventional Steam Coal | Retired | 80 | Unknown |
|---|
| 4 | Conventional Steam Coal | Retired | 80 | Unknown |
|---|
| 6 | Petroleum Liquids | Retired | 19.6 | Unknown |
|---|
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Elm Road Generating Station | 1,402.6 MW | WI | |
| Port Washington Generating StationCurrent | 1,229.6 MW | WI | |
| South Oak Creek | 641.6 MW | WI | |
| Germantown | 390.7 MW | WI | |
| Paris (WI) | 381.6 MW | WI | |
| Concord | 381.6 MW | WI | |
| Paris Solar | 310 MW | WI | |
| Whitewater Generating Station | 283.5 MW | WI |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioWisconsin Electric planned to retire the remaining older coal units at the Port Washington site to make way for the new gas generation.
EIA-860 lists generator 2CT1, generator 2CT2, generator ST2 with this operating date.
Wisconsin Power Constructor, a URS Washington Division subsidiary, was awarded the Phase 2 construction contract for Port Washington Unit 1 (Block 1); URS Washington Division also provided Phase 2 engineering and procurement services under an open-book, shared-risk contract structure.
EIA-860 lists generator 1CT1, generator 1CT2, generator ST1 with this operating date.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Port Washington Generating Station reports 1,229.6 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.
Port Washington Generating Station is a Natural Gas Fired Combined Cycle facility in Ozaukee County, WI, participating in the MISO market.
Port Washington Generating Station is in Ozaukee County, WI, inside the MISO balancing area.
Port Washington Generating Station is operated by Wisconsin Electric Power Co according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Port Washington Generating Station reported 6,688.2 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, Port Washington Generating Station ranks #55 of 540 operating plants of the same technology nationally. It ranks #1 of 7 in WI.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.