Wailuku River Hydroelectric — Plant Summary
- EIA Plant ID
- 54827
- Capacity
- 10.4 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Hawaii, HI
- Operating Since
- 1993
- Generators
- 2
- Operator
- Wailuku Holding Company LLC
- Parent Company
- —
- Annual Generation
- 14,082 MWh
- Capacity Factor
- 15.3%
- Balancing Authority
- —
- ISO/RTO
- —
- NERC Region
- —
Wailuku River Hydroelectric
OperatingHydro
Ranked #1 of 8 Hydro plants in HI#639 of 1454 nationally
10.4 MW Hydro operating in Hawaii, HI
EIAWD
10.4 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1993
Operating Since
Location
Coordinates
19.7130, -155.1486
County
Hawaii, HI
Nearby Plants
- Waiau HydroHydro1 MW · 3.2 km
- PuueoHydro3.1 MW · 6.2 km
- KanoelehuaDistillate Oil21 MW · 9.1 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wailuku Holding Company LLC | — | — |
| Owner(s) | Wailuku Holding Company LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Wailuku River Hydroelectric is a 10.4 MW hydroelectric power plant located in Hawaii County, Hawaii. The plant began operating in 1993 and is owned and operated by Wailuku Holding Company LLC. It utilizes conventional hydroelectric technology and consists of two generators, using water (WAT) as its primary fuel source.
In the most recent year with available data, Wailuku River Hydroelectric generated 14,082 MWh of electricity, achieving a capacity factor of 15.3%. The plant is ranked as the largest of 7 hydroelectric facilities in the state of Hawaii, and 652nd out of 1464 hydroelectric plants nationally. Recent news coverage of the plant includes topics such as hazards, regulatory matters, industry trends, and deals.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
—
Balancing Authority
—
Grid Voltage
69 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
759 MWh
Latest Month
14.1K MWh
Annual Generation
15.3%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
Hazards·flooding
Flood Watch: Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; M
Flood Watch issued March 21 at 3:53AM HST until March 22 at 6:00PM HST by NWS Honolulu HI
NWS Honolulu HI·5 days ago
Hazards·flooding
Hydrologists see record-low water levels in Maui and Kauai streams
'We've not seen low flows like this across the state to this extent ever before.'
Spectrum News·1 years ago
Hazards·flooding
Maui streams flowing at record-low levels
According to hydrologists with the Hawai'i Commission on Water Resource Management, stream-flow measurements are extremely low for this time...
mauinews.com·1 years ago
Regulatory·state puc
Hawaii High Court Sides with Native Community Groups in Water Dispute
The Hawaii Supreme Court this summer issued a landmark ruling upholding water rights and access for Native Hawaiian communities.
State Court Report·1 years ago
Last updated 2026-03-21
View all 10 articles