Waddell — Plant Summary
- EIA Plant ID
- 7164
- Capacity
- 40 MW
- Primary Fuel
- Hydro
- Technology
- Hydroelectric Pumped Storage
- Status
- Operating
- Location
- Maricopa, AZ
- Operating Since
- 1993
- Generators
- 4
- Operator
- Central Arizona Water Conservation Dist
- Parent Company
- —
- Annual Generation
- -18,727 MWh
- Capacity Factor
- -5.3%
- Balancing Authority
- Western Area Power Administration - Desert Southwest Region
- ISO/RTO
- —
- NERC Region
- WECC
Waddell
OperatingHydro
Ranked #6 of 11 Hydro plants in AZ#343 of 1454 nationally
40 MW Hydro operating in Maricopa, AZ — Western Area Power Administration - Desert Southwest Region
EIAWD
40 MW
Nameplate Capacity
4
Generators
units
Hydroelectric Pumped Storage
Technology
1993
Operating Since
Location
Coordinates
33.8448, -112.2723
County
Maricopa, AZ
Nearby Plants
- Lake Pleasant WTPSolar6.5 MW · 4.1 km
- Beehive Energy StorageBESS250 MW · 4.9 km
- WestwingBESS200 MW · 15.4 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Central Arizona Water Conservation Dist | — | — |
| Owner(s) | U S Bureau of Reclamation | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
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
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Western Area Power Administration - Desert Southwest Region
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Municipal
Sector
Electric Utility
Generation
318 MWh
Net Discharge
-18.7K MWh
Annual Net Energy
-5.3%
Capacity Factor
Jan 2023 – Dec 2025
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.
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
Industry·technology
Gas power plant for data center project stirs concerns in Surprise
The developers of a new data center in Surprise are bringing their own power, and neighbors of the project say it's a threat.
The Arizona Republic·4 weeks ago
Industry·corporate
ERMCO Expands Transformer Manufacturing West with New Arizona Facility
The distribution transformer manufacturer's first plant west of the Mississippi River will add three-phase production capacity to address...
ERMCO (other)
POWER Magazine·4 weeks ago
Industry·corporate
ERMCO To Open New Manufacturing Facility In Maricopa County
MARICOPA COUNTY, AZ (January 21, 2026) – Electric Research and Manufacturing Cooperative, Inc. (ERMCO), a leading manufacturer of distribution transformers,...
ERMCO (other)
Arizona Commerce Authority·4 weeks ago
Industry·corporate
ERMCO to open new manufacturing facility in West Valley, creating 500 jobs
PHOENIX — A new manufacturing facility that will create more than 500 jobs is coming to the West Valley.
ERMCO (other)
KTAR News 92.3 FM·4 weeks ago
Last updated 2026-03-14
View all 10 articles