Dion R Holm

Cherry Lake Road, Groveland, CA 95321

Plant Summary Information

Dion R Holm is ranked #11 out of 209 hydroelectric power plants in California in terms of total annual net electricity generation.

Dion R Holm is comprised of 2 generators and generated 40.0 GWh during the 3-month period between June 2025 to September 2025.

Plant Name	Dion R Holm
Utility Name	City & County of San Francisco
Location	Tuolumne County, CA
Initial Operation Date	August 1960
Last Update	Sep 2025
Annual Generation	465.8 GWh
Annual Consumption	1.6 M MMBtu
Ranked #1,415 out of 12,539 Power Plants Nationwide
Ranked #81 out of 1,332 Water Power Plants Nationwide
Ranked #90 out of 1,600 California Power Plants
Ranked #11 out of 209 California Water Power Plants
Fuel Types	Water

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Summary Information
Plant Name	Dion R Holm (380)
Plant Address	Cherry Lake Road, Groveland, CA 95321
Utility	City & County of San Francisco (16612)
Latitude, Longitude	37.89665, -119.9675
Generation Dates on File	Jan 2001 to Sep 2025
Initial Operation Date	August 1960
Annual Generation	465.8 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	Cherry Reservoir
Ash Impoundment	No
Transmission / Distribution Owner	City & County of San Francisco (16612) CA
Grid Voltage	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	90.1 MW
Nameplate Power Factor	0.95
Summer Capacity	93.5 MW
Winter Capacity	92.9 MW
Minimum Load	1 MW

Uprate/Derate Completed	No
Status	Operating
First Operation Date	August 1960
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

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	90.1 MW
Nameplate Power Factor	0.95
Summer Capacity	93.4 MW
Winter Capacity	91.3 MW
Minimum Load	1 MW

Uprate/Derate Completed	No
Status	Operating
First Operation Date	August 1960
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
#71	Calderwood	Tallassee, TN	549.2 GWh
#72	Dardanelle	Dardanelle, AR	517.3 GWh
#73	Folsom	Folsom, CA	509.9 GWh
#74	Osage Dam	Eldon, MO	497.1 GWh
#75	Fairfield Pumped Storage	Jenkinsville, SC	491.5 GWh
#76	Nickajack	New Hope, TN	491.2 GWh
#77	Yale	Amboy, WA	488.4 GWh
#78	Narrows (NC)	Badin, NC	487.5 GWh
#79	Cheoah	Tapoco, NC	484.9 GWh
#80	Merwin	Ariel, WA	467.3 GWh
#82	Box Canyon	Ione, WA	464.1 GWh
#83	John H Kerr	Boydton, VA	462.9 GWh
#84	Swift 1	Cougar, WA	459.1 GWh
#85	Long Lake	Ford, WA	456.2 GWh
#86	Guntersville	Guntersville, AL	454.8 GWh
#87	Lay Dam	Clanton, AL	454.4 GWh
#88	Walter Bouldin Dam	Wetumpka, AL	450.3 GWh
#89	Douglas Dam	Dandridge, TN	446.4 GWh
#90	Meldahl Hydroelectric Project	Foster, KY	445.6 GWh
#91	Balch 2	Balch Camp, CA	443.4 GWh

Below are closest 20 power plants surrounding Dion R Holm.

Plant Name	Plant Location	Annual Generation	Distance
Beardsley	None, CA	55.7 GWh	22 mi
Collierville Powerhouse	Murphys, CA	365.5 GWh	28.3 mi
Don Pedro	La Grange, CA	277.5 GWh	28.3 mi
Donnells	None, CA	219.2 GWh	24.5 mi
Exchequer	Snelling, CA	267.9 GWh	27.1 mi
La Grange	La Grange, CA	4.4 GWh	30.4 mi
McSwain	Snelling, CA	31.8 GWh	31.9 mi
Moccasin	Moccasin, CA	279.7 GWh	19.1 mi
Moccasin Low Head Hydro Project	Moccasin, CA	4.0 MWh	19.6 mi
Murphys	Murphys, CA	15.5 GWh	31.3 mi
New Melones	Jamestown, CA	275.9 GWh	30.8 mi
Pacific-Ultrapower Chinese Station	Jamestown, CA	138.2 GWh	27.9 mi
Phoenix	Sonora, CA	8.0 GWh	21.7 mi
R C Kirkwood	Groveland, CA	404.0 GWh	1.5 mi
Sand Bar Power Plant	Stanislaus Ntl. Fores, CA	85.5 GWh	22.3 mi
Sierra Pacific Chinese Camp	Chinese Camp, CA	4.6 GWh	26.6 mi
Sierra Pacific Sonora	Standard, CA	34.9 GWh	19.7 mi
Sonora 1	Jamestown, CA	621.0 MWh	30.6 mi
Spring Gap	Long Barn, CA	29.8 GWh	21.5 mi
Stanislaus	Vallecito, CA	315.8 GWh	27.6 mi