CUSHMAN 2

Operating

Hydro power plant

Capacity
81 MW
Primary fuel
Hydro
County
Mason County
Operator
CITY OF TACOMA - (WA)
Status
Operating
Commissioned
1930
EIA plant ID
3915
Generators
5
Technology
Conventional Hydroelectric
Net generation (2024)
179 GWh
Capacity factor (2024, EIA nameplate)
24%
Data vintage
EIA-860 2024 final; EIA-923 2022-2024 final
Coordinates
47.3698, -123.1600

See it on the map

CUSHMAN 2, an 81 MW Hydro power plant in Mason County, Washington. Operated by CITY OF TACOMA - (WA), commissioned 1930.

How CUSHMAN 2 compares

With 81 MW of capacity, CUSHMAN 2 ranks 56th among the 126 operating power plants Bywatts maps in Washington and 25th of the 65 operating Hydro plants in the state. It accounts for about 0.4% of Washington's operating Hydro capacity and 0.3% of all operating capacity in the state. Nationally it is the 208th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1930, it is older than 88% 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 Mason County with 2 other operating plants, CUSHMAN 1 and LILLIWAUP FALLS GENERATING.

EIA-860 lists 5 generators at the site with 85 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 179 GWh in 2024 (a 24% capacity factor), up 13% from 2022. Its generators came online between 1930 and 2013.

Grid neighborhood

The nearest named substation is POTLATCH (115 kV), about 1.6 miles away; the closest transmission line found within 10 miles is a 110 kV line owned by CITY OF TACOMA - (WA), under 0.1 miles away. Another 3 operating power plants totaling 57 MW sit within 25 miles; the largest is CUSHMAN 1 (43 MW, Hydro). Within 50 miles are 6 mapped data centers; the nearest is Intergate West / Digital.forest / Fortress in Tukwila, about 41.4 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

Weather peril exposure

CUSHMAN 2 is an 81 MW hydro power plant in Mason County, WA, operated by CITY OF TACOMA - (WA), commissioned in 1930. Mason County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.6 of 5 at the 16th national percentile. Earthquake is the leading peril, rated Relatively Moderate by FEMA at the 99th percentile.

The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.

1.6 of 5Modeled catastrophe exposure
LowExposure band
EarthquakeLeading peril
Relatively ModerateFEMA county risk rating

Mason County hazard ratings

PerilFEMA ratingNational percentilePeril scoreEvents per year
EarthquakeRelatively Moderate99th4.9 of 50.03
Coastal floodingRelatively Moderate88th4.5 of 53.1
Riverine floodingRelatively Moderate75th4.0 of 50.18
Heat waveRelatively Low57th3.3 of 52.7
WildfireVery Low36th2.4 of 5<0.01
Ice stormVery Low24th1.9 of 50.31
Winter weatherRelatively Low22nd1.9 of 511.8
Strong windVery Low7th1.3 of 5<0.01
LightningVery Low7th1.3 of 55.2
TornadoVery Low6th1.2 of 50.04
HailVery Low3rd1.1 of 50.01

Perils not assessed in Mason County

These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.

PerilWhy it is not scored
HurricaneFEMA rating is "Not Applicable" for this county

Model hail, wind and flood exposure for Mason County in the weather risk calculator

Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.

Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.