Middle Fork Interbay
Key Takeaway
Middle Fork Interbay is classified as low hazard in California. It was completed in 1966 and is 60 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 70 ft (taller than 72.8% in CA) |
| Dam Length | 233 ft |
| Dam Type | Concrete |
| Max Storage | 155 acre-ft |
| Normal Storage | 155 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 33 sq mi |
| Max Discharge | 37,400 cfs |
| Year Completed | 1966 (60 years old) |
| NID ID | CA00858 |
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
Placer County Water Agency
Local Government
Nearby Dams
Mark Edson
El Dorado, CA
High Hazard 162 ftRalston Afterbay
Placer, CA
High Hazard 89 ftRock Creek
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Low Hazard 35 ftL. L. Anderson
Placer, CA
High Hazard 231 ftDuncan Creek Diversion
Placer, CA
Low Hazard 20 ftMorning Star
Placer, CA
Low Hazard 44 ftGeorgetown Cntrl
El Dorado, CA
Significant Hazard 38 ftFrequently Asked Questions
What is the hazard classification of Middle Fork Interbay?
Middle Fork Interbay 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 Middle Fork Interbay?
Middle Fork Interbay is owned by Placer County Water Agency (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Middle Fork Interbay built?
Middle Fork Interbay was completed in 1966, making it 60 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 Middle Fork Interbay?
Middle Fork Interbay serves the following purposes: Irrigation, Hydroelectric, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Middle Fork Interbay?
Middle Fork Interbay has a dam height of 70 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 Middle Fork Interbay last inspected?
Middle Fork Interbay was last inspected on June 22, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.