Tamarack Energy
Wood biomass power plant in Adams County, Idaho. 6.2 MW of nameplate capacity across 1 generator, operated by Tamarack Energy.
Also known as EIA plant 50099
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Key facts
- Capacity
- 6.2 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- June 1983First generator online
- Operator
- Tamarack EnergyEIA operator ID 18461
- Grid
- IPCOBalancing authority IPCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Adams County, ID44.9549, −116.3871
- EIA plant ID
- 50099EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Tamarack Energy produces
Free · EIA-923Net generation, 2025
14.1 GWh
14,096 MWh, final
Capacity factor, 2025
26.0%
2024: 29.4%
January to July 2026
6.64 GWh
Provisional
Range, 2015 to 2025
13.0–29.7
GWh a year. Low 2023, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 38,147 | Not reported | 12 of 12 |
| 2002 | 45,284 | Not reported | 12 of 12 |
| 2003 | 48,410 | Not reported | 12 of 12 |
| 2004 | 47,245 | Not reported | 12 of 12 |
| 2005 | 51,962 | Not reported | 12 of 12 |
| 2006 | 40,524 | Not reported | 12 of 12 |
| 2007 | 38,169 | Not reported | 12 of 12 |
| 2008 | 32,050 | Not reported | 12 of 12 |
| 2009 | 38,617 | Not reported | 12 of 12 |
| 2010 | 33,623 | 61.9% | 12 of 12 |
| 2011 | 32,982 | 60.7% | 12 of 12 |
| 2012 | 36,046 | 66.2% | 12 of 12 |
| 2013 | 32,640 | 60.1% | 12 of 12 |
| 2014 | 28,818 | 53.1% | 12 of 12 |
| 2015 | 29,704 | 54.7% | 12 of 12 |
| 2016 | 26,306 | 48.3% | 12 of 12 |
| 2017 | 19,942 | 36.7% | 12 of 12 |
| 2018 | 25,911 | 47.7% | 12 of 12 |
| 2019 | 21,860 | 40.2% | 12 of 12 |
| 2020 | 23,575 | 43.3% | 12 of 12 |
| 2021 | 13,510 | 27.2% | 11 of 12 |
| 2022 | 13,747 | 25.3% | 12 of 12 |
| 2023 | 13,036 | 24.0% | 12 of 12 |
| 2024 | 16,003 | 29.4% | 12 of 12 |
| 2025 | 14,096 | 26.0% | 12 of 12 |
| 2026 (provisional, partial year) | 6,638 | 21.0% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GEN1 | Wood/Wood Waste Biomass | 6.2 | June 1983 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Tamarack Energy as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Tamarack Energy
How much power does Tamarack Energy produce?
Tamarack Energy reported 14,096 MWh (14.1 GWh) of net generation in 2025, a 26.0% capacity factor on 6.2 MW of nameplate capacity. From January to July 2026 it reported 6.64 GWh, which is provisional.
Where is Tamarack Energy?
Tamarack Energy is in Adams County, Idaho, at 44.9549, −116.3871. It is in the Idaho Power Company balancing area (IPCO).
Who operates Tamarack Energy?
EIA-860M for August 2026 lists Tamarack Energy as the operator (EIA operator ID 18461). The operator is not always the owner.
When did Tamarack Energy start operating?
Its first generator began operating in June 1983, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page