River Mill
Clackamas County, Oregon · EIA plant ID 3049 · Operator: Portland General Electric Co
Nameplate19MWSummer 25 MW
Generators5in service
Net generation77GWh12 mo to Dec 2025
Capacity factor36%hydro units, summer MW
Heat rate—thermal plants only
First online1911
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 | 80.2 | 38.8% | — |
| 2002 | 99.4 | 48.1% | — |
| 2003 | 97.6 | 45.1% | — |
| 2004 | 106 | 48.9% | — |
| 2005 | 76.5 | 35.4% | — |
| 2006 | 106.8 | 49.4% | — |
| 2007 | 97.8 | 45.2% | — |
| 2008 | 113.5 | 52.3% | — |
| 2009 | 108.9 | 50.3% | — |
| 2010 | 113 | 52.2% | — |
| 2011 | 108.8 | 50.3% | — |
| 2012 | 117.2 | 54.0% | — |
| 2013 | 95.9 | 44.3% | — |
| 2014 | 105 | 48.5% | — |
| 2015 | 74.1 | 34.3% | — |
| 2016 | 105.2 | 48.5% | — |
| 2017 | 110.2 | 50.9% | — |
| 2018 | 88 | 40.7% | — |
| 2019 | 70.3 | 32.5% | — |
| 2020 | 84.4 | 38.9% | — |
| 2021 | 79.6 | 36.8% | — |
| 2022 | 104.2 | 48.2% | — |
| 2023 | 83.8 | 38.7% | — |
| 2024 | 99.1 | 45.7% | — |
| 2025 | 77.3 | 35.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 3.3 | 4.3 | Nov 1911 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 3.3 | 4.3 | Dec 1911 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 3.3 | 4.3 | Jan 1912 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 3.9 | 5.2 | Dec 1927 | Operating | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 5 | 6.6 | May 1952 | Operating | — | coming soon |
Owner / operator
Operator: Portland General Electric Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Portland General Electric Co | 100.0% | 19 MW |
Nearby plants
Within 80 km.
| Day Hill Solar, LLC | 2 MW | 3.8 km |
| OR - Solops - SPI 18 - Clayfield | 3 MW | 4.2 km |
| Faraday | 37 MW | 4.3 km |
| North Fork | 41 MW | 8.4 km |
| SulusSolar17 | 3 MW | 8.5 km |
| Firwood Solar, LLC | 10 MW | 9.6 km |