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644.1 MW Conventional Hydroelectric (351 MW) + Hydroelectric Pumped Storage (293 MW) operating in Butte, CA — California Independent System Operator
644.1 MW
Nameplate Capacity
6
Generators
units
Hybrid (2)
Technology
Conventional Hydroelectric + Hydroelectric Pumped Storage
1968
Operating Since
Coordinates
39.5430, -121.4922
County
Butte, CA
Nearby Plants
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | California Dept. of Water Resources | California Department of Water Resources | — |
| Owner(s) | California Dept. of Water Resources | California Department of Water Resources | — |
| Status | Operating | operating | — |
GEM identifies the owner as California Department of Water Resources
This entity is not yet in the GEM ownership database — chain unavailable.
The Edward C Hyatt plant, located in Butte County, California, is a 644.1 MW hybrid hydroelectric facility owned and operated by the California Department of Water Resources. Commissioned in 1968, the plant utilizes both conventional hydroelectric and pumped storage technologies across its six generators. The primary fuel source is water (WAT).
In the most recent year of available data, the plant generated 1,952,819 MWh of electricity, achieving a capacity factor of 34.7%. The Edward C Hyatt plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. It is ranked as the 5th largest hydroelectric plant out of 42 in California, and 38th out of 194 nationally.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
State
Sector
Electric Utility
82.0K MWh
Net Discharge
2.0M MWh
Annual Net Energy
34.7%
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: $1.5B
Point of Interconnection
Nearest Substation
Hyatt Switchyard · 230 kV
Substation Distance
0.382 km
Operator
California Department of Water Resources
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
HYATT5_7_B1
Pricing Hub
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
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