ALDER

How ALDER compares

With 50 MW of capacity, ALDER ranks 66th among the 126 operating power plants Bywatts maps in Washington and 31st of the 65 operating Hydro plants in the state. It accounts for about 0.2% of Washington's operating Hydro capacity and 0.2% of all operating capacity in the state. Nationally it is the 280th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1945, it is older than 82% of the 125 operating Washington plants with a recorded commissioning year. Its operator, CITY OF TACOMA - (WA), runs 7 operating plants in Washington totaling 713 MW. It shares Pierce County with 5 other operating plants, including FREDERICKSON POWER LP and FREDERICKSON.

EIA-860 lists 2 generators at the site with 50 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 183 GWh in 2024 (a 42% capacity factor), down 20% from 2022. Its generators came online between 1945 and 1947.

Grid neighborhood

The nearest named substation is LA GRANDE (115 kV), about 2.2 miles away; the closest transmission line found within 10 miles is a 115 kV line owned by CITY OF TACOMA - (WA), under 0.1 miles away. Another 8 operating power plants totaling 1,058 MW sit within 25 miles; the largest is FREDERICKSON POWER LP (318 MW, Natural Gas). Within 50 miles is one mapped data center, Intergate West / Digital.forest / Fortress in Tukwila, about 47.9 miles away.

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