Williams Hydro
Somerset County, Maine · EIA plant ID 1510 · Operator: Brookfield White Pine Hydro LLC
Nameplate13MWSummer 15 MW
Generators2in service
Net generation64GWh12 mo to Dec 2025
Capacity factor49%hydro units, summer MW
Heat rate—thermal plants only
First online1939
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 | 78.6 | 72.6% | — |
| 2002 | 71.3 | 65.9% | — |
| 2003 | 100.7 | 93.0% | — |
| 2004 | 89.6 | 82.6% | — |
| 2005 | 100.7 | 93.1% | — |
| 2006 | 90.8 | 83.9% | — |
| 2007 | 86.9 | 80.0% | — |
| 2008 | 103.1 | 78.8% | — |
| 2009 | 101.8 | 78.0% | — |
| 2010 | 96.9 | 74.3% | — |
| 2011 | 104.4 | 80.0% | — |
| 2012 | 97.8 | 74.7% | — |
| 2013 | 90.9 | 69.6% | — |
| 2014 | 94.2 | 72.1% | — |
| 2015 | 94.5 | 72.4% | — |
| 2016 | 83.2 | 63.6% | — |
| 2017 | 93 | 71.2% | — |
| 2018 | 82 | 62.8% | — |
| 2019 | 64.5 | 49.4% | — |
| 2020 | 78 | 59.6% | — |
| 2021 | 61.2 | 46.9% | — |
| 2022 | 67 | 51.3% | — |
| 2023 | 97.2 | 74.5% | — |
| 2024 | 80.2 | 61.3% | — |
| 2025 | 63.5 | 48.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| WI1 | Conventional Hydroelectric | HY | 7 | 8.2 | Jan 1939 | Operating | — | coming soon |
| WI2 | Conventional Hydroelectric | HY | 6 | 6.7 | Jan 1950 | Operating | — | coming soon |
Owner / operator
Operator: Brookfield White Pine Hydro LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Brookfield White Pine Hydro LLC | 100.0% | 13 MW |
Nearby plants
Within 80 km.
| ME-EDFR-Phase I-Embden | 5 MW | 1.3 km |
| Cenergy - Kiger | 1 MW | 1.8 km |
| MEVS Clark LLC | 5 MW | 11.7 km |
| BNRG North Anson (CSG) | 2 MW | 12.5 km |
| Wyman Hydro | 72 MW | 12.7 km |
| Dairy Farm | 4 MW | 13.5 km |