1 MW Hydro operating in Hawaii, HI
1 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1921
Operating Since
Coordinates
19.7203, -155.1189
County
Hawaii, HI
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Hawaii Electric Light Co Inc | Hawaii Electric Light | — |
| Owner(s) | Hawaii Electric Light Co Inc | Hawaiian Electric Industries | — |
| Status | Operating | — | — |
Waiau Hydro is a hydroelectric power plant located in Hawaii County, Hawaii. The plant has a total capacity of 1 MW and is comprised of 2 generators utilizing conventional hydroelectric technology. It began operating in 1921 and is owned by Hawaiian Electric Industries, with Hawaii Electric Light Co Inc. serving as the operator. The plant's primary fuel source is water (WAT).
Waiau Hydro is ranked as the 7th largest power plant out of 7 in the state of Hawaii, and 1445th out of 1464 nationally. There has been one news article related to the plant, categorized under hazards.
Generated from EIA, GEM, and public data sources
NERC Region
—
Balancing Authority
—
Grid Voltage
13.8 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
0 MWh
Latest Month
0 MWh
Annual Generation
0.0%
Capacity Factor
No financial data available for this plant.
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
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
Last updated 2026-03-21
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