Wailuku River Hydroelectric
Hydro power plant in Hawaii County, Hawaii. 10.4 MW of nameplate capacity across 2 generators, operated by Wailuku Holding Company LLC.
Also known as EIA plant 54827
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 10.4 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 1993First generator online
- Operator
- Wailuku Holding Company LLCEIA operator ID 54809
- Grid
- Not reported
- Price nodes
- None linkedNo verified ISO node
- Location
- Hawaii County, HI19.7130, −155.1486
- EIA plant ID
- 54827EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Wailuku River Hydroelectric produces
Free · EIA-923Net generation, 2025
14.1 GWh
14,082 MWh, final
Capacity factor, 2025
15.5%
2024: 32.7%
January to July 2026
26.5 GWh
Provisional
Range, 2015 to 2025
14.1–43.4
GWh a year. Low 2025, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 32,150 | Not reported | 12 of 12 |
| 2002 | 26,307 | Not reported | 12 of 12 |
| 2003 | 22,984 | Not reported | 12 of 12 |
| 2004 | 24,270 | Not reported | 12 of 12 |
| 2005 | 33,411 | Not reported | 12 of 12 |
| 2006 | 31,472 | Not reported | 12 of 12 |
| 2007 | 27,285 | Not reported | 12 of 12 |
| 2008 | 17,891 | Not reported | 12 of 12 |
| 2009 | 30,733 | Not reported | 12 of 12 |
| 2010 | 11,887 | 13.0% | 12 of 12 |
| 2011 | 24,569 | 27.0% | 12 of 12 |
| 2012 | 26,933 | 29.5% | 12 of 12 |
| 2013 | 15,129 | 16.6% | 12 of 12 |
| 2014 | 18,185 | 20.0% | 12 of 12 |
| 2015 | 40,881 | 44.9% | 12 of 12 |
| 2016 | 36,288 | 39.7% | 12 of 12 |
| 2017 | 19,466 | 21.4% | 12 of 12 |
| 2018 | 42,430 | 46.6% | 12 of 12 |
| 2019 | 23,951 | 26.3% | 12 of 12 |
| 2020 | 23,237 | 25.4% | 12 of 12 |
| 2021 | 34,084 | 37.4% | 12 of 12 |
| 2022 | 43,417 | 47.7% | 12 of 12 |
| 2023 | 20,333 | 22.3% | 12 of 12 |
| 2024 | 29,900 | 32.7% | 12 of 12 |
| 2025 | 14,082 | 15.5% | 12 of 12 |
| 2026 (provisional, partial year) | 26,528 | 50.1% | 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. 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 |
|---|---|---|---|
| 8101 | Conventional Hydroelectric | 5.2 | May 1993 |
| 8102 | Conventional Hydroelectric | 5.2 | May 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 Wailuku Holding Company LLC 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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Questions about Wailuku River Hydroelectric
How much power does Wailuku River Hydroelectric produce?
Wailuku River Hydroelectric reported 14,082 MWh (14.1 GWh) of net generation in 2025, a 15.5% capacity factor on 10.4 MW of nameplate capacity. From January to July 2026 it reported 26.5 GWh, which is provisional.
Where is Wailuku River Hydroelectric?
Wailuku River Hydroelectric is in Hawaii County, Hawaii, at 19.7130, −155.1486.
Who operates Wailuku River Hydroelectric?
EIA-860M for August 2026 lists Wailuku Holding Company LLC as the operator (EIA operator ID 54809). The operator is not always the owner.
When did Wailuku River Hydroelectric start operating?
Its first generator began operating in May 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