Lower Granite

OperatingHydro

Ranked #10 of 75 Hydro plants in WA#31 of 1454 nationally

810 MW Hydro operating in Whitman, WA — Bonneville Power Administration

EIAGEMWD

810 MW

Nameplate Capacity

Generators

units

Conventional Hydroelectric

Technology

1975

Operating Since

Location

Coordinates

46.6595, -117.4294

County

Whitman, WA

Nearby Plants

Biotech LS 0836
Distillate Oil1 MW · 22.2 km
Grimes Way
Natural Gas4 MW · 22.6 km

Ownership & Operator

Owner data does not fully agree across sources.

EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.

Field	EIA	GEM	Wikidata
Operator	USACE Northwestern Division	US Army Corps of Engineers - Walla Walla District	United States Army Corps of Engineers
Owner(s)	USACE Northwestern Division	US Army Corps of Engineers - Walla Walla District [100%]	—
Status	Operating	operating	—

Ownership Chain

GEM identifies the owner as US Army Corps of Engineers - Walla Walla District [100%]

This entity is not yet in the GEM ownership database — chain unavailable.

About

Lower Granite Lock and Dam is a concrete gravity run-of-the-river dam in southeastern Washington in the United States. On the lower Snake River, it bridges Whitman and Garfield counties. Opened 51 years ago in 1975, the dam is located 22 miles (35 km) south of Colfax and 35 miles (56 km) north of Pomeroy.

Read more on Wikipedia

Lower Granite is a hydroelectric power plant located in Whitman County, Washington. The plant, which began operating in 1975, has a total capacity of 810 MW distributed across 6 generators. It is owned and operated by the USACE Northwestern Division. The plant utilizes conventional hydroelectric technology with water (WAT) as its primary fuel source.

In the most recent year with available data, Lower Granite generated 1,461,002 MWh of electricity, achieving a capacity factor of 20.6%. The plant operates within the Bonneville Power Administration balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Lower Granite is ranked as the 8th largest power plant out of 23 in Washington state, and 29th out of 194 hydroelectric plants nationally.

Generated from EIA, GEM, and public data sources