Mccoy Flat
Key Takeaway
Mccoy Flat is classified as low hazard in California. It was completed in 1891 and is 135 years old. Its primary use is water supply.
Physical Details
| Dam Height | 21 ft (taller than 17.3% in CA) |
| Dam Length | 650 ft |
| Dam Type | Earth |
| Max Storage | 17.3K acre-ft |
| Surface Area | 1,800 acres |
| Drainage Area | 110 sq mi |
| Year Completed | 1891 (135 years old) |
| NID ID | CA00517 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Lassen Irrigation Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mccoy Flat?
Mccoy Flat is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Mccoy Flat?
Mccoy Flat is owned by Lassen Irrigation Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mccoy Flat built?
Mccoy Flat was completed in 1891, making it 135 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 Mccoy Flat?
Mccoy Flat 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 Mccoy Flat?
Mccoy Flat has a dam height of 21 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 Mccoy Flat last inspected?
Mccoy Flat was last inspected on May 24, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.