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167 MW Natural Gas operating in Humboldt, CA — California Independent System Operator
167 MW
Nameplate Capacity
10
Generators
units
Natural Gas Internal Combustion Engine
Technology
2010
Operating Since
Coordinates
40.7409, -124.2088
County
Humboldt, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Pacific Gas & Electric Co. | — | — |
| Owner(s) | Pacific Gas & Electric Co. | — | — |
| Status | Operating | — | — |
Located in Humboldt County, California, the Humboldt Bay Generating Station is a 167 MW natural gas-fired power plant operated by Pacific Gas & Electric Co. The plant began operating in 2010 and consists of 10 natural gas internal combustion engine generators. It is connected to the California Independent System Operator (CAISO) balancing authority within the Western Electricity Coordinating Council (WECC) region.
In its latest year of reported generation, the plant produced 347,782 MWh of electricity, achieving a capacity factor of 23.8%. According to available data, the installed cost of the plant was $1,329.54 per kW, based on FERC filings. The Humboldt Bay facility is ranked as the 59th largest power plant in California out of 76, and 801st nationally out of 945 plants.
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
25.7K MWh
Latest Month
347.8K MWh
Annual Generation
23.8%
Capacity Factor
CO₂ Intensity
1022 lb/MWh
NOx
23 lb/MWh
SO₂
0.028 lb/MWh
CH₄
0.019 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
29.1%
Annual Net Gen
426 GWh
CO₂eq
1023 lb/MWh
Subregion
WECC California
Internal combustion · PACIFIC GAS AND ELECTRIC COMPANY · Data from 2015–2024
$1,592/kW
Installed Cost
$50/kW
Annual CapEx
$84.3/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
Humboldt Bay
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
HMBUNIT1_7_GN010
Pricing Hub
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
EIA-860 direct report
Last updated 2026-03-26
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