Moccasin

Hwy 120-49 junction, Moccasin, CA 95347

Plant Summary Information

Moccasin is ranked #40 out of 206 hydroelectric power plants in California in terms of total annual net electricity generation.

Moccasin is comprised of 2 generators and generated 107.5 GWh during the 3-month period between February 2025 to May 2025.

Plant Name	Moccasin
Utility Name	City & County of San Francisco
Location	Tuolumne County, CA
Initial Operation Date	August 1969
Last Update	May 2025
Annual Generation	277.8 GWh
Annual Consumption	1.1 M MMBtu
Ranked #2,010 out of 12,312 Power Plants Nationwide
Ranked #166 out of 1,323 Water Power Plants Nationwide
Ranked #192 out of 1,568 California Power Plants
Ranked #40 out of 206 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 May 2025
Initial Operation Date	August 1969
Annual Generation	277.8 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 2024 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	45 MW
Nameplate Power Factor	0.9
Summer Capacity	57.3 MW
Winter Capacity	54.3 MW
Minimum Load	1 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	51.8 MW
Nameplate Power Factor	0.9
Summer Capacity	53.9 MW
Winter Capacity	54.3 MW
Minimum Load	1 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
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
#156	Martin Dam	Dadeville, AL	305.9 GWh
#157	Don Pedro	La Grange, CA	305.5 GWh
#158	Cabot	Montague, MA	304.2 GWh
#159	LaGrande	La Grande, WA	297.3 GWh
#160	Logan Martin Dam	Vincent, AL	297.3 GWh
#161	Center Hill	Lancaster, TN	291.6 GWh
#162	Lucky Peak Power Plant Project	Boise, ID	290.6 GWh
#163	Thomson	Carlton, MN	290.5 GWh
#164	Lost Creek	Trail, OR	289.1 GWh
#165	Judge F Carr	French Gulch, CA	287.0 GWh
#167	Camino	Camino, CA	277.3 GWh
#168	Gaston	Roanoke Rapids, NC	276.2 GWh
#169	Poe	Storrie, CA	276.0 GWh
#170	Great Falls (TN)	Rock Island, TN	275.6 GWh
#171	Walters	Waterville, NC	275.3 GWh
#172	Canyon Ferry	Helena, MT	275.1 GWh
#173	Millers Ferry	Camden, AL	272.7 GWh
#174	Roanoke Rapids	Roanoke Rapids, NC	271.7 GWh
#175	Jordan Dam	Wetumpka, AL	270.7 GWh
#176	Exchequer	Snelling, CA	267.9 GWh

Below are closest 20 power plants surrounding Moccasin.

Plant Name	Plant Location	Annual Generation	Distance
Angels	Angels Camp, CA	6.3 GWh	22.4 mi
Collierville Powerhouse	Murphys, CA	393.6 GWh	23.6 mi
Dion R Holm	Groveland, CA	484.2 GWh	19.1 mi
Don Pedro	La Grange, CA	305.5 GWh	10.2 mi
Exchequer	Snelling, CA	267.9 GWh	15.6 mi
La Grange	La Grange, CA	4.4 GWh	12.5 mi
McSwain	Snelling, CA	31.8 GWh	19.9 mi
Merced Falls	Snelling, CA	9.4 GWh	19.9 mi
Moccasin Low Head Hydro Project	Moccasin, CA	4.0 MWh	0.9 mi
New Melones	Jamestown, CA	343.7 GWh	15.7 mi
Pacific-Ultrapower Chinese Station	Jamestown, CA	143.0 GWh	10.7 mi
Phoenix	Sonora, CA	8.0 GWh	15.5 mi
R C Kirkwood	Groveland, CA	403.7 GWh	19.5 mi
Sierra Pacific Chinese Camp	Chinese Camp, CA	4.6 GWh	9.9 mi
Sierra Pacific Sonora	Standard, CA	34.9 GWh	10.9 mi
Sonora 1	Jamestown, CA	621.0 MWh	13.7 mi
Stanislaus	Vallecito, CA	315.8 GWh	23.1 mi
Tulloch	Jamestown, CA	103.6 GWh	17.3 mi
Turlock Lake	Hickman, CA	7.0 GWh	21.2 mi
Upper Dawson	La Grange, CA	10.7 GWh	14.4 mi