ICE HARBOR

How ICE HARBOR compares

With 603 MW of capacity, ICE HARBOR ranks 15th among the 126 operating power plants Bywatts maps in Washington and 12th of the 65 operating Hydro plants in the state. It accounts for about 2.9% of Washington's operating Hydro capacity and 2.0% of all operating capacity in the state. Nationally it is the 38th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1962, it is older than 68% of the 125 operating Washington plants with a recorded commissioning year. Its operator, USACE NORTHWESTERN DIVISION, runs 5 operating plants in Washington totaling 5,489 MW. It shares Walla Walla County with 3 other operating plants, including LOWER MONUMENTAL and FPL ENERGY VANSYCLE LLC (WA).

EIA-860 lists 6 generators at the site with 603 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 1,341 GWh in 2024 (a 25% capacity factor), down 9% from 2022. Its generators came online between 1962 and 1976.

Grid neighborhood

The nearest named substation is LEVEY (115 kV), about 0.6 miles away; the closest transmission line found within 10 miles is a 115 kV line owned by BONNEVILLE POWER ADMINISTRATION, under 0.1 miles away. Another 6 operating power plants totaling 425 MW sit within 25 miles; the largest is FPL ENERGY VANSYCLE LLC (WA) (177 MW, Wind).

Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology