Island Street Peaking Plant
Natural gas power plant in Outagamie County, Wisconsin. 60.5 MW of nameplate capacity across 1 generator, operated by WPPI Energy.
Also known as EIA plant 55836
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 60.5 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- June 2004First generator online
- Operator
- WPPI EnergyEIA operator ID 20858
- Grid
- MISOBalancing authority MISO
- Price nodes
- 1 MISO nodeResource nodes with prices
- Location
- Outagamie County, WI44.2761, −88.2658
- EIA plant ID
- 55836EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Island Street Peaking Plant produces
Free · EIA-923Net generation, 2025
20.2 GWh
20,179 MWh, final
Capacity factor, 2025
3.8%
2024: 2.1%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
2.4–20.2
GWh a year. Low 2020, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | 36,432 | Not reported | 12 of 12 |
| 2006 | 48,294 | Not reported | 12 of 12 |
| 2007 | 39,985 | Not reported | 12 of 12 |
| 2008 | 35,615 | Not reported | 12 of 12 |
| 2009 | 14,549 | Not reported | 12 of 12 |
| 2010 | 21,133 | 4.0% | 12 of 12 |
| 2011 | 6,193 | 1.2% | 12 of 12 |
| 2012 | 2,206 | 0.4% | 12 of 12 |
| 2013 | 6,151 | 1.2% | 12 of 12 |
| 2014 | 11,333 | 2.1% | 12 of 12 |
| 2015 | 10,339 | 2.0% | 12 of 12 |
| 2016 | 10,053 | 1.9% | 12 of 12 |
| 2017 | 5,736 | 1.1% | 12 of 12 |
| 2018 | 12,377 | 2.3% | 12 of 12 |
| 2019 | 7,919 | 1.5% | 12 of 12 |
| 2020 | 2,418 | 0.5% | 12 of 12 |
| 2021 | 12,814 | 2.4% | 12 of 12 |
| 2022 | 11,760 | 2.2% | 12 of 12 |
| 2023 | 8,000 | 1.5% | 12 of 12 |
| 2024 | 10,950 | 2.1% | 12 of 12 |
| 2025 | 20,179 | 3.8% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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
14,456
US short tons. 2024: 8,158
SO₂, 2025
0
US short tons
NOx, 2025
11
US short tons
CO₂ per MWh, calculated
0.72 t
About 1,433 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (1A, 1B), matched to EIA plant 55836 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, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| FT81 | Natural Gas Fired Combustion Turbine | 60.5 | June 2004 |
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 WPPI Energy 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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Questions about Island Street Peaking Plant
How much power does Island Street Peaking Plant produce?
Island Street Peaking Plant reported 20,179 MWh (20.2 GWh) of net generation in 2025, a 3.8% capacity factor on 60.5 MW of nameplate capacity.
Where is Island Street Peaking Plant?
Island Street Peaking Plant is in Outagamie County, Wisconsin, at 44.2761, −88.2658. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Island Street Peaking Plant?
EIA-860M for August 2026 lists WPPI Energy as the operator (EIA operator ID 20858). The operator is not always the owner.
When did Island Street Peaking Plant start operating?
Its first generator began operating in June 2004, according to EIA-860M.
Does InfraMap have power prices for Island Street Peaking Plant?
Yes. InfraMap has MISO day-ahead and real-time prices at 1 price node linked to Island Street Peaking Plant, 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
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page