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40 MW Hydro operating in Plumas, CA — California Independent System Operator
40 MW
Nameplate Capacity
1
Generators
unit
Conventional Hydroelectric
Technology
1958
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Pacific Gas & Electric Co. | — | — |
| Owner(s) | Pacific Gas & Electric Co. | — | — |
| Status | Operating | — | — |
Butt Valley is a 40 MW conventional hydroelectric power plant located in Plumas County, California. The plant, which began operating in 1958, has one generator and is owned and operated by Pacific Gas & Electric Co. It is located within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Butt Valley is ranked 72nd out of 247 power plants in California and 348th out of 1464 nationally.
In the most recent year with available data, Butt Valley generated 149,328 MWh of electricity, resulting in a capacity factor of 42.4%. Financial data indicates an installed cost of $2,121.03 per kW. The plant's operations and related industry news have been the subject of 6 news articles.
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
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
17.1K MWh
Latest Month
149.3K MWh
Annual Generation
42.4%
Capacity Factor
Hydro with storage · PACIFIC GAS AND ELECTRIC COMPANY · Data from 2015–2024
$2,210/kW
Installed Cost
$17.5/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
Butt Valley
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
BUTTVLLY_7_B1
Pricing Hub
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
EIA-860 direct report
Last updated 2026-03-14
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