Tunnel 1 Power Project
Hydro power plant in Malheur County, Oregon. 8.5 MW of nameplate capacity across 1 generator, operated by Owyhee Irrigation District.
Also known as EIA plant 50362
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 8.5 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- June 1993First generator online
- Operator
- Owyhee Irrigation DistrictEIA operator ID 14243
- Grid
- IPCOBalancing authority IPCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Malheur County, OR43.6420, −117.2327
- EIA plant ID
- 50362EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Tunnel 1 Power Project produces
Free · EIA-923Net generation, 2025
21.1 GWh
21,069 MWh, final
Capacity factor, 2025
28.3%
2024: 30.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.0–22.9
GWh a year. Low 2015, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 7,654 | Not reported | 12 of 12 |
| 2002 | 7,826 | Not reported | 12 of 12 |
| 2003 | 0 | Not reported | 12 of 12 |
| 2004 | 7,481 | Not reported | 12 of 12 |
| 2005 | 17,486 | Not reported | 12 of 12 |
| 2006 | 33,742 | Not reported | 12 of 12 |
| 2007 | 12,560 | Not reported | 12 of 12 |
| 2008 | 11,064 | Not reported | 12 of 12 |
| 2009 | 8,423 | Not reported | 12 of 12 |
| 2010 | 6,473 | 10.6% | 12 of 12 |
| 2011 | 24,100 | 39.3% | 12 of 12 |
| 2012 | 15,469 | 25.2% | 12 of 12 |
| 2013 | 3,018 | 4.9% | 12 of 12 |
| 2014 | 0 | 0.0% | 12 of 12 |
| 2015 | 0 | 0.0% | 12 of 12 |
| 2016 | 10,561 | 17.2% | 12 of 12 |
| 2017 | 22,861 | 37.3% | 12 of 12 |
| 2018 | 16,369 | 26.7% | 12 of 12 |
| 2019 | 22,316 | 36.4% | 12 of 12 |
| 2020 | 18,874 | 30.7% | 12 of 12 |
| 2021 | 6,262 | 10.2% | 12 of 12 |
| 2022 | 3,528 | 5.8% | 12 of 12 |
| 2023 | 15,280 | Not reported | 12 of 12 |
| 2024 | 22,425 | 30.0% | 12 of 12 |
| 2025 | 21,069 | 28.3% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 8.5 | June 1993 |
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 Owyhee Irrigation District as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Tunnel 1 Power Project
More plants operated by Owyhee Irrigation District
Questions about Tunnel 1 Power Project
How much power does Tunnel 1 Power Project produce?
Tunnel 1 Power Project reported 21,069 MWh (21.1 GWh) of net generation in 2025, a 28.3% capacity factor on 8.5 MW of nameplate capacity.
Where is Tunnel 1 Power Project?
Tunnel 1 Power Project is in Malheur County, Oregon, at 43.6420, −117.2327. It is in the Idaho Power Company balancing area (IPCO).
Who operates Tunnel 1 Power Project?
EIA-860M for August 2026 lists Owyhee Irrigation District as the operator (EIA operator ID 14243). The operator is not always the owner.
When did Tunnel 1 Power Project start operating?
Its first generator began operating in June 1993, 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