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40 MW Hydro operating in Maricopa, AZ — Western Area Power Administration - Desert Southwest Region
40 MW
Nameplate Capacity
4
Generators
units
Hydroelectric Pumped Storage
Technology
1993
Operating Since
Coordinates
33.8448, -112.2723
County
Maricopa, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Central Arizona Water Conservation Dist | — | — |
| Owner(s) | U S Bureau of Reclamation | — | — |
| Status | Operating | — | — |
The Waddell plant is a 40 MW hydroelectric pumped storage facility located in Maricopa County, Arizona. It began operating in 1993 and consists of 4 generators. The primary fuel source is water (WAT). The plant is owned and operated by Central Arizona Water Conservation District.
Waddell operates within the Western Electricity Coordinating Council (WECC) NERC region and is under the balancing authority of the Western Area Power Administration - Desert Southwest Region. It ranks as the 6th largest of 11 hydroelectric plants in Arizona, and 350th out of 1464 nationally.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
318 MWh
Net Discharge
-18.7K MWh
Annual Net Energy
-5.3%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $91.8M
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
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ask pi about WaddellWestern Area Power Administration - Desert Southwest Region (WALC)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
Sector
Electric Utility