Tamarack Energy Partnership
Adams County, Idaho · EIA plant ID 50099 · Operator: Tamarack Energy Partners
Nameplate6MWSummer 6 MW
Generators1in service
Net generation14GWh12 mo to Aug 2026
Capacity factor27%other units, summer MW
Heat rate—thermal plants only
First online1983
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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), other 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 | 38.1 | 75.1% | — |
| 2002 | 45.3 | 89.1% | — |
| 2003 | 48.4 | 95.3% | — |
| 2004 | 47.2 | 92.7% | — |
| 2005 | 52 | 102.3% | — |
| 2006 | 40.5 | 79.8% | — |
| 2007 | 38.2 | 75.1% | — |
| 2008 | 32.1 | 62.9% | — |
| 2009 | 38.6 | 76.0% | — |
| 2010 | 33.6 | 66.2% | — |
| 2011 | 33 | 64.9% | — |
| 2012 | 36 | 70.8% | — |
| 2013 | 32.6 | 64.2% | — |
| 2014 | 28.8 | 56.7% | — |
| 2015 | 29.7 | 58.5% | — |
| 2016 | 26.3 | 51.6% | — |
| 2017 | 19.9 | 39.3% | — |
| 2018 | 25.9 | 51.0% | — |
| 2019 | 21.9 | 43.0% | — |
| 2020 | 23.6 | 46.3% | — |
| 2021 | 13.5 | 26.6% | — |
| 2022 | 13.7 | 27.1% | — |
| 2023 | 13 | 25.7% | — |
| 2024 | 16 | 31.4% | — |
| 2025 | 14.1 | 27.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Wood/Wood Waste Biomass | ST | 6.2 | 5.8 | Jun 1983 | Operating | — | coming soon |
Owner / operator
Operator: Tamarack Energy Partners. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Tamarack Energy Partners | 100.0% | 6 MW |
Nearby plants
Within 80 km.
| El Dorado Hydro Elk Creek | 3 MW | 29.8 km |
| Oxbow (OR) | 190 MW | 35.3 km |
| Hells Canyon | 411 MW | 40.5 km |
| Brownlee | 675 MW | 42.3 km |
| Cascade Dam | 12 MW | 54.7 km |
| Wallowa Falls | 1 MW | 73.5 km |