Balch Diversion
Key Takeaway
Balch Diversion is classified as high hazard in California. It was completed in 1927 and is 99 years old. Its primary use is hydroelectric. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 135 ft (taller than 87.9% in CA) |
| Dam Length | 396 ft |
| Dam Type | Concrete |
| Max Storage | 1.3K acre-ft |
| Normal Storage | 1.3K acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 56 sq mi |
| Max Discharge | 47,000 cfs |
| Year Completed | 1927 (99 years old) |
| NID ID | CA00335 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Pacific Gas and Electric Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Balch Diversion?
Balch Diversion is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Balch Diversion?
Balch Diversion is owned by Pacific Gas and Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Balch Diversion built?
Balch Diversion was completed in 1927, making it 99 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Balch Diversion?
Balch Diversion serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Balch Diversion?
Balch Diversion has a dam height of 135 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Balch Diversion last inspected?
Balch Diversion was last inspected on August 16, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.