Mammoth Pool
Sierra National Forest, North Fork, CA 93643Plant Summary Information
Mammoth Pool is ranked #27 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 48.8 GWh during the 3-month period between November 2024 to February 2025.
| Plant Name | Mammoth Pool |
|---|---|
| Utility Name | Southern California Edison Co |
| Location | Madera County, CA |
| Initial Operation Date | March 1960 |
| Last Update | Feb 2025 |
| Annual Generation | 378.6 GWh |
| Annual Consumption | 1.4 M MMBtu |
| Ranked #1,603 out of 11,993 Power Plants Nationwide | |
| Ranked #124 out of 1,370 Water Power Plants Nationwide | |
| Ranked #120 out of 1,579 California Power Plants | |
| Ranked #27 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 Feb 2025 |
| Initial Operation Date | March 1960 |
| Annual Generation | 378.6 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 | 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 |
|---|---|---|---|
| #114 | Thompson Falls | Thompson Falls, MT | 396.3 GWh |
| #115 | Bradley Lake | Homer, AK | 395.1 GWh |
| #116 | Rainbow (MT) | Great Falls, MT | 394.9 GWh |
| #117 | Markland | Florence, IN | 394.7 GWh |
| #118 | Cabot | Montague, MA | 394.4 GWh |
| #119 | Big Creek 1 | Big Creek, CA | 393.8 GWh |
| #120 | Curtis Palmer Hydroelectric | Corinth, NY | 393.2 GWh |
| #121 | Box Canyon | Ione, WA | 383.5 GWh |
| #122 | Keswick | Redding, CA | 382.5 GWh |
| #123 | Hartwell Lake | Hartwell, GA | 378.9 GWh |
| #125 | C J Strike | Bruneau, ID | 377.1 GWh |
| #126 | Pit 4 | Big Bend, CA | 374.2 GWh |
| #127 | James B Black | Big Bend, CA | 370.4 GWh |
| #128 | Old Hickory | Hendersonville, TN | 368.7 GWh |
| #129 | Belden | Belden, CA | 365.1 GWh |
| #130 | Douglas Dam | Dandridge, TN | 364.9 GWh |
| #131 | Big Creek 4 | North Fork, CA | 358.8 GWh |
| #132 | Smithland Hydroelectric Plant | Smithland, KY | 354.5 GWh |
| #133 | Caribou 2 | Belden, CA | 353.3 GWh |
| #134 | Big Creek 2A | Auberry, CA | 352.2 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 | 352.2 GWh | 2.2 mi |
| Big Creek 3 | Auberry, CA | 592.9 GWh | 5.6 mi |
| Big Creek 4 | North Fork, CA | 358.8 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 | 438.5 GWh | 26.8 mi |
| J S Eastwood | Shaver Lake, CA | 8.2 GWh | 6.7 mi |
| Kerckhoff 2 | Auberry, CA | 420.4 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 |