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2323 MW Nuclear operating in San Luis Obispo, CA — California Independent System Operator
2,323 MW
Nameplate Capacity
2
Generators
units
Nuclear
Technology
1985
Operating Since
Coordinates
35.2115, -120.8555
County
San Luis Obispo, 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 | Pacific Gas & Electric Co. | Pacific Gas and Electric | Pacific Gas and Electric Company |
| Owner(s) | Pacific Gas & Electric Co. | PG&E | — |
| Status | Operating | operating | — |
The Diablo Canyon Power Plant is a nuclear power plant near Avila Beach in San Luis Obispo County, California. Following the permanent shutdown of the San Onofre Nuclear Generating Station in 2013, Diablo Canyon is now the only operational nuclear plant in California, as well as the state's largest single power station. It was the subject of controversy and protests during its construction, with nearly two thousand civil disobedience arrests in a two-week period in 1981.
Read more on WikipediaDiablo Canyon Power Plant is a 2,323 MW nuclear power plant located in San Luis Obispo County, California. The plant, which began operating in 1985, is owned and operated by Pacific Gas & Electric (PG&E). It consists of two nuclear reactors and is the largest power plant in California, and the 17th largest nuclear plant in the United States. Diablo Canyon operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
The plant's latest annual generation was 17,558,394 MWh, achieving a capacity factor of 86.4%. Financial data indicates an installed cost of $3,573.58 per kW, based on FERC filings. The plant has been the subject of 10 news articles, all pertaining to regulatory matters.
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
500.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
1.6M MWh
Latest Month
17.6M MWh
Annual Generation
86.4%
Capacity Factor
Nuclear · PACIFIC GAS AND ELECTRIC COMPANY · Data from 2015–2024
$4,135/kW
Installed Cost
$210/kW
Annual CapEx
$31.0/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
Diablo Canyon · 230 kV
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
DIABLO2_7_B1
Pricing Hub
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
EIA-860 direct report
Last updated 2026-04-19
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