Upper Falls Control Works
Key Takeaway
Upper Falls Control Works is classified as low hazard in Washington. It was completed in 1922 and is 104 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 24 ft (taller than 32.6% in WA) |
| Dam Length | 366 ft |
| Dam Type | Gravity |
| Max Storage | 800 acre-ft |
| Normal Storage | 800 acre-ft |
| Surface Area | 150 acres |
| Drainage Area | 4,255 sq mi |
| Max Discharge | 38,000 cfs |
| Year Completed | 1922 (104 years old) |
| NID ID | WA00038 |
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
Avista Corporation
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Upper Falls Control Works?
Upper Falls Control Works 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 Falls Control Works?
Upper Falls Control Works is owned by Avista Corporation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Falls Control Works built?
Upper Falls Control Works was completed in 1922, making it 104 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 Falls Control Works?
Upper Falls Control Works 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 Upper Falls Control Works?
Upper Falls Control Works has a dam height of 24 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 Falls Control Works last inspected?
Upper Falls Control Works was last inspected on August 16, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.