A G Wishon — Plant Summary
- EIA Plant ID
- 293
- Capacity
- 12.8 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Madera, CA
- Operating Since
- 1910
- Generators
- 4
- Operator
- Pacific Gas & Electric Co.
- Parent Company
- —
- Annual Generation
- 21,616 MWh
- Capacity Factor
- 19.2%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
A G Wishon
OperatingHydro
Ranked #107 of 247 Hydro plants in CA#584 of 1454 nationally
12.8 MW Hydro operating in Madera, CA — California Independent System Operator
EIAGEMWD
12.8 MW
Nameplate Capacity
4
Generators
units
Conventional Hydroelectric
Technology
1910
Operating Since
Location
Coordinates
37.1511, -119.5047
County
Madera, CA
Nearby Plants
- Big Creek 4Hydro100 MW · 1.9 km
- KerckhoffHydro22.6 MW · 7.8 km
- Kerckhoff 2Hydro139.5 MW · 10.0 km
Ownership & Operator
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. | Southern California Edison | — |
| Owner(s) | Pacific Gas & Electric Co. | Southern California Edison (SCE) [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Southern California Edison (SCE) [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
A G Wishon is a hydroelectric power plant located in Madera County, California. The plant has a total capacity of 12.8 MW across 4 generators and is operated by Pacific Gas & Electric Co. Commissioned in 1910, the plant utilizes conventional hydroelectric technology and its primary fuel source is water (WAT). It ranks as the 107th largest power plant in California out of 247, and 593rd nationally out of 1464.
The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In the most recent year of data, A G Wishon generated 21,616 MWh of electricity, resulting in a capacity factor of 19.2%. Financial data indicates an installed cost of $4,506.35 per kW. The financial data source is the Federal Energy Regulatory Commission (FERC).
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
70 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
2.3K MWh
Latest Month
21.6K MWh
Annual Generation
19.2%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$4,570/kW
Installed Cost
$128.2/MWh
Operating Cost
PACIFIC GAS AND ELECTRIC COMPANY
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
CAISO
LMP Node
WISHON_6_UNITS-APND
Pricing Hub
TH_ZP26_GEN-APND
Location Type
Aggregated Node
Node Source
EIA-860 direct report
News & Articles (1)Beta
General
Power and a street: Wishon family celebrates pioneering ancestor
Albert Graves (AG) Wishon, who arrived in Tulare in the 1890s, and would steadily make a name for himself by showcasing the potential for electricity in the...
The Business Journal·6 years ago
Last updated 2026-03-26
View all articles