Red Rock No. 1
Key Takeaway
Red Rock No. 1 is classified as high hazard in California. It was completed in 1893 and is 133 years old. Its primary use is water supply. 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 | 63 ft (taller than 69.2% in CA) |
| Dam Length | 485 ft |
| Dam Type | Earth |
| Max Storage | 10.0K acre-ft |
| Surface Area | 491 acres |
| Drainage Area | 44 sq mi |
| Year Completed | 1893 (133 years old) |
| NID ID | CA00510 |
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
Dodge Ranch LLC
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Red Rock No. 1?
Red Rock No. 1 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 Red Rock No. 1?
Red Rock No. 1 is owned by Dodge Ranch LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Red Rock No. 1 built?
Red Rock No. 1 was completed in 1893, making it 133 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 Red Rock No. 1?
Red Rock No. 1 serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Red Rock No. 1?
Red Rock No. 1 has a dam height of 63 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 Red Rock No. 1 last inspected?
Red Rock No. 1 was last inspected on May 18, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.