Ralston
9600 Blacksmith Flat Rd., Foresthill, CA 95631Plant Summary Information
Ralston is ranked #38 out of 207 hydroelectric power plants in California in terms of total annual net electricity generation.
Ralston is comprised of 1 generator and generated 55.8 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | Ralston |
|---|---|
| Utility Name | Placer County Water Agency - (CA) |
| Location | Placer County, CA |
| Initial Operation Date | October 1966 |
| Last Update | Dec 2025 |
| Annual Generation | 302.6 GWh |
| Annual Consumption | 1.1 M MMBtu |
| Ranked #2,056 out of 13,301 Power Plants Nationwide | |
| Ranked #150 out of 1,316 Water Power Plants Nationwide | |
| Ranked #174 out of 1,641 California Power Plants | |
| Ranked #38 out of 207 California Water Power Plants | |
| Fuel Types | Water |
| Previous Operator |
Placer County Water Agency (2013 to 2024) Placer County Water Agency - (CA) (2025 to 2025) |
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Monthly Net Generation for Ralston
Monthly Plant Fuel Consumption for Ralston
Ralston Details
| Summary Information | |
|---|---|
| Plant Name | Ralston (427) |
| Plant Address | 9600 Blacksmith Flat Rd., Foresthill, CA 95631 |
| Utility | Placer County Water Agency - (CA) (15127) |
| Latitude, Longitude | 39.001, -120.72505 |
| Generation Dates on File | Jan 2001 to Dec 2025 |
| Initial Operation Date | October 1966 |
| Annual Generation | 302.6 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 | Rubicon River |
| Ash Impoundment | |
| Transmission / Distribution Owner | Pacific Gas & Electric Co (14328) CA |
| Grid Voltage | 230.00 kV |
| Energy Storage | No |
Generator 1 Details Operating October 1966
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 79.2 MW |
| Nameplate Power Factor | 0.9 |
| Summer Capacity | 86 MW |
| Winter Capacity | 86 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | October 1966 |
| 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 | 10M |
Ralston Plant Owners
| Owner Name | Address | Ownership | We couldn't locate any owners for this plant |
|---|
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| #149 | Haas | Balch Camp, CA | 305.0 GWh |
| #151 | Moccasin | Moccasin, CA | 300.1 GWh |
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| #153 | Rainbow (MT) | Great Falls, MT | 298.6 GWh |
| #154 | Bliss (ID) | Bliss, ID | 297.7 GWh |
| #155 | Camino | Camino, CA | 297.3 GWh |
| #156 | Comerford | Monroe, NH | 296.8 GWh |
| #157 | Wyman Hydro | Bingham, ME | 295.2 GWh |
| #158 | Eufaula Dam | Porum, OK | 294.0 GWh |
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| #160 | LaGrande | La Grande, WA | 291.2 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Ralston.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Alta Powerhouse | Alta, CA | 2.2 GWh | 15.4 mi |
| Camino | Camino, CA | 297.3 GWh | 15.6 mi |
| Chicago Park | Colfax, CA | 65.2 GWh | 15.1 mi |
| Chili Bar | Placerville, CA | 25.2 GWh | 16.5 mi |
| Combie South | Auburn, CA | 4.4 GWh | 17.9 mi |
| Drum 1 | Alta, CA | 15.1 GWh | 17.8 mi |
| Drum 2 | Alta, CA | 164.2 GWh | 17.9 mi |
| Dutch Flat | Alta, CA | 66.0 GWh | 16.1 mi |
| Dutch Flat 2 | Dutch Flat, CA | 15.2 GWh | 16.1 mi |
| El Dorado | Pollock Pines, CA | 80.5 GWh | 15.4 mi |
| French Meadows | Foresthill, CA | 42.6 GWh | 17.9 mi |
| Halsey | Auburn, CA | 21.5 GWh | 17.3 mi |
| Jaybird | Camino, CA | 451.2 GWh | 15.5 mi |
| Jones Fork | Fresh Pond, CA | 14.9 GWh | 21.2 mi |
| Middle Fork | Foresthill, CA | 483.9 GWh | 7.1 mi |
| Oxbow (CA) | Foresthill, CA | 23.2 GWh | 1.2 mi |
| Robbs Peak | Fresh Pond, CA | 41.4 GWh | 20 mi |
| Rollins | Colfax, CA | 36.9 GWh | 15.3 mi |
| Union Valley | Fresh Pond, CA | 89.1 GWh | 17.8 mi |
| White Rock/Slab Creek | Placerville, CA | 445.7 GWh | 16.6 mi |