Mammoth Pool
Sierra National Forest, North Fork, CA 93643Plant Summary Information
Mammoth Pool is ranked #26 out of 221 hydroelectric power plants in California in terms of total annual net electricity generation.
Mammoth Pool is comprised of 2 generators and generated 34.6 GWh during the 3-month period between October 2024 to January 2025.
| Plant Name | Mammoth Pool |
|---|---|
| Utility Name | Southern California Edison Co |
| Location | Madera County, CA |
| Initial Operation Date | March 1960 |
| Last Update | Jan 2025 |
| Annual Generation | 398.7 GWh |
| Annual Consumption | 1.5 M MMBtu |
| Ranked #1,531 out of 11,979 Power Plants Nationwide | |
| Ranked #114 out of 1,369 Water Power Plants Nationwide | |
| Ranked #111 out of 1,578 California Power Plants | |
| Ranked #26 out of 221 California Water Power Plants | |
| Fuel Types | Water |
Map of Mammoth Pool
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Monthly Net Generation for Mammoth Pool
Mammoth Pool Details
| Summary Information | |
|---|---|
| Plant Name | Mammoth Pool (344) |
| Plant Address | Sierra National Forest, North Fork, CA 93643 |
| Utility | Southern California Edison Co (17609) |
| Latitude, Longitude | 37.2203, -119.33798 |
| Generation Dates on File | Jan 2001 to Jan 2025 |
| Initial Operation Date | March 1960 |
| Annual Generation | 398.7 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 | San Joaquin River |
| Ash Impoundment | |
| Transmission / Distribution Owner | Southern California Edison Co (17609) CA |
| Grid Voltage | 220.00 kV |
| Energy Storage | No |
Generator 1 Details Operating March 1960
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 95 MW |
| Nameplate Power Factor | 1 |
| Summer Capacity | 95 MW |
| Winter Capacity | 95 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | March 1960 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Time From Cold Shutdown To Full Load | 10M |
Generator 2 Details OA March 1960
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 95 MW |
| Nameplate Power Factor | 1 |
| Summer Capacity | 95 MW |
| Winter Capacity | 95 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | OA |
| First Operation Date | March 1960 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 10M |
Mammoth Pool Plant Owners
| Owner Name | Address | Generator | Ownership |
|---|---|---|---|
| We couldn't locate any owners for this plant | |||
Power Plants with Similar Net Generation
Power plants with a similar annual net generation from Water.
| Rank | Plant Name | Plant Location | Annual Generation |
|---|---|---|---|
| #104 | Jaybird | Camino, CA | 424.1 GWh |
| #105 | Kerckhoff 2 | Auberry, CA | 417.0 GWh |
| #106 | Flaming Gorge | Dutch John, UT | 413.6 GWh |
| #107 | Long Lake | Ford, WA | 413.0 GWh |
| #108 | Mitchell Dam | Verbena, AL | 409.4 GWh |
| #109 | Ross | Rockport, WA | 406.7 GWh |
| #110 | Middle Fork | Foresthill, CA | 406.2 GWh |
| #111 | Comerford | Monroe, NH | 405.1 GWh |
| #112 | Parker Dam | Parker, CA | 403.6 GWh |
| #113 | James B Black | Big Bend, CA | 400.8 GWh |
| #115 | Bartletts Ferry | Salem, AL | 397.0 GWh |
| #116 | Thompson Falls | Thompson Falls, MT | 396.3 GWh |
| #117 | Bradley Lake | Homer, AK | 395.1 GWh |
| #118 | Rainbow (MT) | Great Falls, MT | 394.9 GWh |
| #119 | Markland | Florence, IN | 394.7 GWh |
| #120 | Cabot | Montague, MA | 394.4 GWh |
| #121 | Big Creek 1 | Big Creek, CA | 393.8 GWh |
| #122 | Curtis Palmer Hydroelectric | Corinth, NY | 393.2 GWh |
| #123 | Keswick | Redding, CA | 393.0 GWh |
| #124 | Box Canyon | Ione, WA | 383.5 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Mammoth Pool.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| A G Wishon | North Fork, CA | 16.1 GWh | 10.4 mi |
| Balch 1 | Balch Camp, CA | 184.4 GWh | 25.5 mi |
| Balch 2 | Balch Camp, CA | 489.7 GWh | 25.6 mi |
| Big Creek 1 | Big Creek, CA | 393.8 GWh | 5.5 mi |
| Big Creek 2 | Auberry, CA | 296.2 GWh | 2.2 mi |
| Big Creek 2A | Auberry, CA | 375.7 GWh | 2.2 mi |
| Big Creek 3 | Auberry, CA | 607.6 GWh | 5.6 mi |
| Big Creek 4 | North Fork, CA | 371.2 GWh | 10.1 mi |
| Big Creek 8 | Auberry, CA | 152.9 GWh | 0.9 mi |
| Clovis North High School | Fresno, CA | 1.4 GWh | 31.7 mi |
| Friant Hydro Facility | Friant, CA | 106.2 GWh | 25.3 mi |
| Haas | Balch Camp, CA | 450.5 GWh | 26.8 mi |
| J S Eastwood | Shaver Lake, CA | 13.7 GWh | 6.7 mi |
| Kerckhoff 2 | Auberry, CA | 417.0 GWh | 15.9 mi |
| Kings River PH | Balch Camp, CA | 206.7 GWh | 25 mi |
| Kings River Syphon | Sanger, CA | 1.3 GWh | 32 mi |
| Pine Flat | Piedra, CA | 485.0 GWh | 26.8 mi |
| Portal | Lakeshore, CA | 21.2 GWh | 10.2 mi |
| San Joaquin 2 | North Fork, CA | 1.5 GWh | 8.9 mi |
| SCCCD - Clovis Community College | Fresno, CA | 2.0 GWh | 31.7 mi |