Lower Baker
Skagit County, Washington · EIA plant ID 3855 · Operator: Puget Sound Energy Inc
Nameplate104MWSummer 102 MW
Generators2in service
Net generation365GWh12 mo to Dec 2025
Capacity factor41%hydro units, summer MW
Heat rate—thermal plants only
First online1960
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 | 277.5 | 44.4% | — |
| 2002 | 400.9 | 64.1% | — |
| 2003 | 389.6 | 62.3% | — |
| 2004 | 387.3 | 61.8% | — |
| 2005 | 296.3 | 42.8% | — |
| 2006 | 334.1 | 48.3% | — |
| 2007 | 436.2 | 63.0% | — |
| 2008 | 321 | 46.3% | — |
| 2009 | 344.8 | 49.8% | — |
| 2010 | 366.3 | 48.2% | — |
| 2011 | 332.8 | 43.8% | — |
| 2012 | 349.3 | 45.9% | — |
| 2013 | 352.6 | 41.9% | — |
| 2014 | 429.6 | 44.1% | — |
| 2015 | 308.6 | 31.7% | — |
| 2016 | 358.8 | 36.7% | — |
| 2017 | 313.1 | 34.0% | — |
| 2018 | 385.3 | 41.8% | — |
| 2019 | 263.8 | 28.6% | — |
| 2020 | 383.7 | 41.5% | — |
| 2021 | 376.4 | 40.8% | — |
| 2022 | 317.5 | 35.4% | — |
| 2023 | 262.8 | 29.3% | — |
| 2024 | 326.7 | 36.3% | — |
| 2025 | 364.8 | 40.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 3 | Conventional Hydroelectric | HY | 80.8 | 79.3 | Mar 1960 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 23.1 | 23.1 | Jul 2013 | Operating | — | coming soon |
Owner / operator
Operator: Puget Sound Energy Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Puget Sound Energy Inc | 100.0% | 104 MW |
Nearby plants
Within 80 km.
| Upper Baker | 105 MW | 11.8 km |
| Koma Kulshan Associates | 12 MW | 14.8 km |
| Darrington | 5 MW | 32.6 km |
| Newhalem | 2 MW | 39.4 km |
| Nooksack Hydro | 2 MW | 40.4 km |
| Glacier Battery Storage | 2 MW | 40.7 km |