Moccasin

Hwy 120-49 junction, Moccasin, CA 95347

Plant Summary Information

Moccasin is ranked #42 out of 187 hydroelectric power plants in California in terms of total annual net electricity generation.

Moccasin is comprised of 2 generators and generated 31.6 GWh during the 3-month period between December 2024 to March 2025.

Plant Name	Moccasin
Utility Name	City & County of San Francisco
Location	Tuolumne County, CA
Initial Operation Date	August 1969
Last Update	Mar 2025
Annual Generation	277.9 GWh
Annual Consumption	1.0 M MMBtu
Ranked #1,962 out of 11,623 Power Plants Nationwide
Ranked #165 out of 1,242 Water Power Plants Nationwide
Ranked #190 out of 1,487 California Power Plants
Ranked #42 out of 187 California Water Power Plants
Fuel Types	Water

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Summary Information
Plant Name	Moccasin (381)
Plant Address	Hwy 120-49 junction, Moccasin, CA 95347
Utility	City & County of San Francisco (16612)
Latitude, Longitude	37.80939, -120.29925
Generation Dates on File	Jan 2001 to Mar 2025
Initial Operation Date	August 1969
Annual Generation	277.9 GWh
Fuel Types	Water

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Regulated
NERC Region	WECC
Balancing Authority	California Independent System Operator (CISO)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source	Priest Reservoir
Ash Impoundment	No
Transmission / Distribution Owner	City & County of San Francisco (16612) CA
Grid Voltage	115.00 kV / 230.00 kV
Energy Storage	No

* Data obtained from the 2023 EIA 860 Report

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	INTKEP_2_UNITS-APND
RTO ISO Location Designation For Reporting Wholesale Sales Data	INTKEP_2_UNITS
Nameplate Capacity	50 MW
Nameplate Power Factor	0.9
Summer Capacity	50 MW
Winter Capacity	50 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	August 1969
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	1H
Other Planned Modifications	Yes
Other Modifications	June 2025
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	INTKEP_2_UNITS-APND
RTO ISO Location Designation For Reporting Wholesale Sales Data	INTKEP_2_UNITS
Nameplate Capacity	50 MW
Nameplate Power Factor	0.9
Summer Capacity	50 MW
Winter Capacity	50 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	September 1969
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	1H
Other Planned Modifications	Yes
Other Modifications	June 2024
Multiple Fuels	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Water.

Rank	Plant Name	Plant Location	Annual Generation
#155	H M Jackson	Sultan, WA	298.0 GWh
#156	Big Creek 2	Auberry, CA	296.2 GWh
#157	Bliss	Bliss, ID	295.1 GWh
#158	Morony	Great Falls, MT	295.0 GWh
#159	Norris Dam	Norris, TN	294.8 GWh
#160	Rumford Falls Hydro Facility	Rumford, ME	290.2 GWh
#161	Gaston	Roanoke Rapids, NC	287.0 GWh
#162	Camino	Camino, CA	281.6 GWh
#163	Holter	Wolf Creek, MT	281.6 GWh
#164	Cordell Hull	Carthage, TN	280.7 GWh
#166	Harris Hydro	West Forks, ME	277.6 GWh
#167	LaGrande	La Grande, WA	277.1 GWh
#168	Narrows 2	Browns Valley, CA	276.7 GWh
#169	Canyon Ferry	Helena, MT	276.5 GWh
#170	Richard B Russell	Elberton, GA	276.3 GWh
#171	Morrow Point	Montrose, CO	273.9 GWh
#172	Belleville Dam	Belleville, WV	272.2 GWh
#173	Ohio Falls	Shippingport Island, KY	272.0 GWh
#174	Drum 2	Alta, CA	271.0 GWh
#175	Upper Baker	Concrete, WA	270.8 GWh

Below are closest 20 power plants surrounding Moccasin.

Plant Name	Plant Location	Annual Generation	Distance
Angels	Angels Camp, CA	7.2 GWh	22.4 mi
Collierville Powerhouse	Murphys, CA	495.9 GWh	23.6 mi
Dion R Holm	Groveland, CA	497.3 GWh	19.1 mi
Don Pedro	La Grange, CA	377.1 GWh	10.2 mi
Exchequer	Snelling, CA	250.6 GWh	15.6 mi
Hickman	Hickman, CA	3.0 GWh	27.7 mi
La Grange	La Grange, CA	8.2 GWh	12.5 mi
Murphys	Murphys, CA	17.8 GWh	24.7 mi
New Melones	Jamestown, CA	427.8 GWh	15.7 mi
Pacific-Ultrapower Chinese Station	Jamestown, CA	146.9 GWh	10.7 mi
Phoenix	Sonora, CA	6.7 GWh	15.5 mi
R C Kirkwood	Groveland, CA	416.7 GWh	19.5 mi
Sand Bar Power Plant	Stanislaus Ntl. Fores, CA	124.3 GWh	27.3 mi
Sierra Pacific Chinese Camp	Chinese Camp, CA	4.9 GWh	9.9 mi
Sierra Pacific Sonora	Standard, CA	34.0 GWh	10.9 mi
Sonora 1	Jamestown, CA	2.7 GWh	13.7 mi
Stanislaus	Vallecito, CA	334.5 GWh	23.1 mi
Tulloch	Jamestown, CA	124.9 GWh	17.3 mi
Turlock Lake	Hickman, CA	5.7 GWh	21.2 mi
Upper Dawson	La Grange, CA	11.5 GWh	14.4 mi