Big
Key Takeaway
Big is classified as low hazard in Oregon. It was completed in 1966 and is 60 years old. Its primary use is water supply.
Physical Details
| Dam Length | 420 ft |
| Dam Type | Gravity |
| Max Storage | 875 acre-ft |
| Normal Storage | 674 acre-ft |
| Surface Area | 640 acres |
| Max Discharge | 31 cfs |
| Year Completed | 1966 (60 years old) |
| NID ID | OR00757 |
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
DOI BLM
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Big?
Big 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 Big?
Big is owned by DOI BLM (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big built?
Big 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 Big?
Big serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Big last inspected?
Big was last inspected on October 12, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.