Upper Blackhorse Dam
Key Takeaway
Upper Blackhorse Dam is classified as low hazard in Washington. It was completed in 1960 and is 66 years old. Its primary use is fish and wildlife pond.
Physical Details
| Dam Height | 10 ft (taller than 4.3% in WA) |
| Dam Length | 160 ft |
| Dam Type | Earth |
| Max Storage | 215 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 728 cfs |
| Year Completed | 1960 (66 years old) |
| NID ID | WA00750 |
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
US FISH AND WILDLIFE SERVICE
Federal Government
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Low HazardFrequently Asked Questions
What is the hazard classification of Upper Blackhorse Dam?
Upper Blackhorse Dam 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 Upper Blackhorse Dam?
Upper Blackhorse Dam is owned by US FISH AND WILDLIFE SERVICE (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Blackhorse Dam built?
Upper Blackhorse Dam was completed in 1960, making it 66 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 Upper Blackhorse Dam?
Upper Blackhorse Dam serves the following purposes: Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upper Blackhorse Dam?
Upper Blackhorse Dam has a dam height of 10 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 Upper Blackhorse Dam last inspected?
Upper Blackhorse Dam was last inspected on October 28, 2013. Inspection dates indicate when a formal review occurred, not the results of that inspection.