HORSE MESA

How HORSE MESA compares

With 149 MW of capacity, HORSE MESA ranks 34th among the 71 operating power plants Bywatts maps in Arizona and 4th of the 9 operating Hydro plants in the state. It accounts for about 5.1% of Arizona's operating Hydro capacity and 0.5% of all operating capacity in the state. Nationally it is the 125th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1927, it is older than 97% of the 69 operating Arizona plants with a recorded commissioning year. Its operator, SALT RIVER PROJECT, runs 11 operating plants in Arizona totaling 5,203 MW. It shares Maricopa County with 28 other operating plants, including PALO VERDE and SANTAN.

EIA-860 lists 4 generators at the site with 131 MW of nameplate capacity, mainly hydroelectric pumped storage technology (this page's HIFLD capacity figure is 149 MW). Net generation was 98.4 GWh in 2024 (an 8.5% capacity factor), up 27% from 2022.

Grid neighborhood

The nearest named substation is HORSE MESA DAM (115 kV), under 0.1 miles away; the closest transmission line found within 10 miles is a 115 kV line owned by SALT RIVER PROJECT, under 0.1 miles away. Another 3 operating power plants totaling 116 MW sit within 25 miles; the largest is MORMON FLAT (67 MW, Hydro). Within 50 miles are 6 mapped data centers; the nearest is Centersquare Phoenix (PHX3) in Mesa, about 31.9 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