Hydroelectric power plants in Arizona

5 operating hydroelectric power plants in Arizona with 2,655 MW of hydroelectric capacity, largest first. From EIA-860M, August 2026.

Plants

Hydroelectric capacity

2,655 MW

Net generation, 2025

4.70 TWh

Largest

Glen Canyon Dam

1,312 MW

Largest hydroelectric power plants in Arizona

#	Plant	Hydroelectric MW	2025 net generation, GWhGWh, 2025	Capacity factor	Operator
1	Glen Canyon DamCoconino County	1,312	2,753	24.0%	U S Bureau of Reclamation
2	Hoover Dam (AZ)Mohave County	1,039	927	10.2%	U S Bureau of Reclamation
3	Davis DamMohave County	255	906	40.6%	U S Bureau of Reclamation
4	RooseveltMaricopa County	36	76.0	24.1%	Salt River Project
5	Stewart MountainMaricopa County	13	36.6	32.1%	Salt River Project

Projects where hydroelectric is the largest fuel or at least a fifth of nameplate capacity. MW is hydroelectric nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources

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All plants in Arizona Largest hydroelectric power plants in the US