Merrill
Lincoln County, Wisconsin · EIA plant ID 4068 · Operator: Wisconsin Public Service Corp
Nameplate2MWSummer 2 MW
Generators3in service
Net generation4GWh12 mo to Dec 2025
Capacity factor18%hydro units, summer MW
Heat rate—thermal plants only
First online1917
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 | 8.7 | 124.8% | — |
| 2002 | 11.9 | 151.3% | — |
| 2003 | 8.8 | 120.1% | — |
| 2004 | 8.4 | 108.7% | — |
| 2005 | 7.6 | 98.3% | — |
| 2006 | 8.5 | 42.3% | — |
| 2007 | 7.4 | 40.4% | — |
| 2008 | 3.2 | 17.5% | — |
| 2009 | 4.6 | 27.8% | — |
| 2010 | 8.3 | 49.6% | — |
| 2011 | 9.3 | 55.6% | — |
| 2012 | 5.1 | 30.6% | — |
| 2013 | 9.8 | 58.7% | — |
| 2014 | 9 | 53.8% | — |
| 2015 | 10.2 | 116.5% | — |
| 2016 | 11.4 | 129.4% | — |
| 2017 | 8.8 | 91.0% | — |
| 2018 | 7.5 | 78.0% | — |
| 2019 | 7 | 34.8% | — |
| 2020 | 10.3 | 51.2% | — |
| 2021 | 9.3 | 46.1% | — |
| 2022 | 8.3 | 41.0% | — |
| 2023 | 8.2 | 40.7% | — |
| 2024 | 4.3 | 21.5% | — |
| 2025 | 3.7 | 18.1% | — |
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 | 0.4 | 0.4 | Mar 1917 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 0.4 | 0.4 | Mar 1917 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 1.5 | 1.5 | Jun 1984 | 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% | 2 MW |
Nearby plants
Within 80 km.
| Alexander | 4 MW | 5.6 km |
| Grandfather Falls | 17 MW | 16.1 km |
| Wausau | 5 MW | 24.9 km |
| Tomahawk | 3 MW | 29.4 km |
| Packaging of America Tomahawk Mill | 19 MW | 29.7 km |
| Rothschild Biomass Cogen Facility | 58 MW | 32.6 km |