Big Creek Dam No. 6
Big Creek Dam No. 6 is a concrete dam located in Madera County, California, built in 1923. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Big Creek Dam No. 6
The primary purpose of Big Creek Dam No. 6 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 San Joaquin River near Big Creek.
The dam stands 155 feet tall and stretches 495 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 1,726 acre-feet, and collects water from a drainage area of 1,195 square miles. Completed in 1923, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 08/02/2023.
At 155 feet, this dam is taller than 99% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The California dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | California |
| County | Madera |
| Nearest City | Big Creek |
| River/Stream | San Joaquin River |
| Coordinates | 37.20748, -119.33037 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 155 ft |
| Dam Height | 155 ft |
| Dam Length | 495 ft |
| Year Completed | 1923 (103 years old) |
Storage & Hydraulics
| NID Storage | 1,726 acre-ft |
| Max Storage | 1,726 acre-ft |
| Normal Storage | 993 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 1,195 sq mi |
| Max Discharge | 114,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Southern California Edison Company |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/02/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00432 |
| Federal ID | CA00432 |
| More Info | State Dam Safety Program |