Portal Forebay Dike
Portal Forebay Dike is an earth dam located in Fresno County, California, built in 1956. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Portal Forebay Dike
The primary purpose of Portal Forebay Dike is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Southern California Edison Company (private). It impounds the Camp 61 Creek near Mono Hot Springs.
The dam stands 18 feet tall and stretches 350 feet across, creates a reservoir covering 20 acres, and has a maximum storage capacity of 390 acre-feet. Completed in 1956, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 08/29/2023.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | California |
| County | Fresno |
| Nearest City | Mono Hot Springs |
| River/Stream | Camp 61 Creek |
| Coordinates | 37.32080, -119.06970 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 350 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 390 acre-ft |
| Max Storage | 390 acre-ft |
| Normal Storage | 325 acre-ft |
| Surface Area | 20 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Southern California Edison Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/29/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CA00442 |
| Federal ID | CA00442S001 |
| More Info | State Dam Safety Program |