Wailuku River Hydroelectric

Hilo Forest Reserve, Hilo, HI 96720

Plant Summary Information

Wailuku River Hydroelectric is ranked #42 out of 67 power plants in Hawaii in terms of total annual net electricity generation.

Wailuku River Hydroelectric is comprised of 2 generators and generated 6.7 GWh during the 3-month period between November 2025 to February 2026.

Plant Name	Wailuku River Hydroelectric
Utility Name	Wailuku Holding Company LLC
Location	Hawaii County, HI
Initial Operation Date	May 1993
Last Update	Feb 2026
Annual Generation	19.3 GWh
Annual Consumption	65.9 k MMBtu
Ranked #5,382 out of 12,637 Power Plants Nationwide
Ranked #748 out of 1,331 Water Power Plants Nationwide
Ranked #42 out of 67 Hawaii Power Plants
Ranked #2 out of 5 Hawaii Water Power Plants
Fuel Types	Water

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Summary Information
Plant Name	Wailuku River Hydroelectric (54827)
Plant Address	Hilo Forest Reserve, Hilo, HI 96720
Utility	Wailuku Holding Company LLC (54809)
Latitude, Longitude	19.71299, -155.14857
Generation Dates on File	Jan 2001 to Feb 2026
Initial Operation Date	May 1993
Annual Generation	19.3 GWh
Fuel Types	Water

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	Yes
FERC Small Power Producer Docket Number	06-70-000.
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Non-Regulated
NERC Region
Balancing Authority	()
NAICS Code	Utilities (22)
Sector	IPP Non-CHP (2)
Water Source	Wailuku River
Ash Impoundment	No
Transmission / Distribution Owner	Hawaii Electric Light Co Inc (8287) HI
Grid Voltage	69.00 kV
Energy Storage	No

* Data obtained from the 2024 EIA 860 Report

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	5.2 MW
Nameplate Power Factor	0.85
Summer Capacity	4.9 MW
Winter Capacity	4.8 MW
Minimum Load	0.1 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	May 1993
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	5.2 MW
Nameplate Power Factor	0.85
Summer Capacity	4.9 MW
Winter Capacity	4.8 MW
Minimum Load	0.1 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	May 1993
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Multiple Fuels	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Water.

Rank	Plant Name	Plant Location	Annual Generation
#738	Middle Fork Irrigation District	Parkdale, OR	20.1 GWh
#739	Nooksack Hydro	Glacier, WA	20.1 GWh
#740	Magic Dam Hydroelectric Project	Shoshone, ID	19.9 GWh
#741	Spearfish Hydro	Spearfish, SD	19.9 GWh
#742	Verdi	Verdi, NV	19.7 GWh
#743	Foothill Feeder	Castaic, CA	19.6 GWh
#744	Burton Dam	Clayton, GA	19.6 GWh
#745	Tieton Dam Hydro Electric Project	Rimrock, WA	19.5 GWh
#746	Falcon Dam & Power	Falcon Heights, TX	19.3 GWh
#747	Tuxedo	Flat Rock, NC	19.3 GWh
#749	Thermalito Diverson Dam	Oroville, CA	19.2 GWh
#750	Lighthouse Hill	Altmar, NY	19.2 GWh
#751	Wainiha Hydro	Hanalei, HI	19.2 GWh
#752	Turnbull Hydro	Fairfield, MT	19.2 GWh
#753	Vallecito Hydroelectric	Bayfield, CO	19.1 GWh
#754	Ketchikan	Ketchikan, AK	19.1 GWh
#755	Soda	Soda Springs, ID	19.1 GWh
#756	Hydro II	Logan, UT	19.1 GWh
#757	Flat Rock	Fine, NY	19.0 GWh
#758	Alexander	Merrill, WI	19.0 GWh

Below are closest 20 power plants surrounding Wailuku River Hydroelectric.

Plant Name	Plant Location	Annual Generation	Distance
AES Maui Kuihelani Solar Hybrid	Waikapu, HI	103.6 GWh	116.7 mi
AES Waikoloa Solar Hybrid	Waikoloa Village, HI	61.5 GWh	42.1 mi
Auwahi Wind Energy Hybrid	Kula, HI	87.2 GWh	97.3 mi
Hale Kuawehi Solar Hybrid	Waimea, HI	74.8 GWh	37.8 mi
Hamakua Energy Plant	Honokaa, HI	107.8 GWh	33.6 mi
Hana Substation	Hana, HI	210.0 MWh	91.2 mi
Kaheawa Wind Power II LLC	Wailuku, HI	49.7 GWh	116.9 mi
Kahului	Kahului, HI	157.1 GWh	118.1 mi
Kanoelehua	Hilo, HI	11.1 GWh	5.6 mi
Keahole	Kailua Kona, HI	294.6 GWh	57.2 mi
Kihei Solar Farm	Kihei, HI	352.0 MWh	111.9 mi
Kuihelani Substation	Kahului, HI	2.0 MWh	117 mi
Maalaea	Kihei, HI	620.6 GWh	115.1 mi
Mauna Loa Macadamia Nut	Keaau, HI	1.4 GWh	9.9 mi
Pakini Nui Wind Farm	Naalehu, HI	117.6 GWh	62.1 mi
Puna	Keaau, HI	105.9 GWh	9.5 mi
Puna Geothermal Venture I	Pahoa, HI	258.9 GWh	23.4 mi
Puueo	Hilo, HI	2.1 GWh	3.9 mi
W H Hill	Hilo, HI	105.6 GWh	5.7 mi
Waimea	Kamuela, HI	7.3 GWh	41.6 mi