Caldron Falls
Marinette County, Wisconsin · EIA plant ID 4061 · Operator: Wisconsin Public Service Corp
Nameplate6MWSummer 6 MW
Generators2in service
Net generation11GWh12 mo to Dec 2025
Capacity factor19%hydro units, summer MW
Heat rate—thermal plants only
First online1924
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), hydro 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.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 12.2 | 20.5% | — |
| 2002 | 17.5 | 29.4% | — |
| 2003 | 13.1 | 21.9% | — |
| 2004 | 14.9 | 24.9% | — |
| 2005 | 10.7 | 18.0% | — |
| 2006 | 10.2 | 17.2% | — |
| 2007 | 9.2 | 15.4% | — |
| 2008 | 11 | 18.4% | — |
| 2009 | 8.4 | 14.0% | — |
| 2010 | 11.7 | 19.6% | — |
| 2011 | 14.3 | 24.0% | — |
| 2012 | 9.6 | 16.0% | — |
| 2013 | 12.5 | 20.9% | — |
| 2014 | 17.1 | 28.7% | — |
| 2015 | 18.6 | 31.1% | — |
| 2016 | 17.8 | 29.8% | — |
| 2017 | 23.7 | 39.8% | — |
| 2018 | 19.2 | 32.2% | — |
| 2019 | 23.8 | 40.0% | — |
| 2020 | 28.8 | 48.3% | — |
| 2021 | 14.6 | 26.0% | — |
| 2022 | 13.4 | 23.8% | — |
| 2023 | 12.5 | 22.3% | — |
| 2024 | 13.7 | 24.4% | — |
| 2025 | 10.9 | 19.4% | — |
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 | Conventional Hydroelectric | HY | 3.2 | 3.2 | Nov 1924 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 3.2 | 3.2 | Nov 1924 | Operating | — | coming soon |
Owner / operator
Operator: Wisconsin Public Service Corp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Wisconsin Public Service Corp | 100.0% | 6 MW |
Nearby plants
Within 80 km.
| High Falls (WI) | 7 MW | 8.9 km |
| Johnson Falls | 3 MW | 9.5 km |
| Sandstone Rapids | 4 MW | 18.7 km |
| White Rapids | 8 MW | 36.2 km |
| Chalk Hill | 8 MW | 37.8 km |
| Grand Rapids | 8 MW | 45.4 km |