Grass Valley
Key Takeaway
Grass Valley is classified as significant hazard in Utah. It was completed in 1917 and is 109 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 13.3K acre-ft |
| Normal Storage | 8.4K acre-ft |
| Drainage Area | 32 sq mi |
| Max Discharge | 37 cfs |
| Year Completed | 1917 (109 years old) |
| NID ID | UT00124 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
NEW CASTLE RESERVOIR COMPANY
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Grass Valley?
Grass Valley is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Grass Valley?
Grass Valley is owned by NEW CASTLE RESERVOIR COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grass Valley built?
Grass Valley was completed in 1917, making it 109 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 Grass Valley?
Grass Valley serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Grass Valley last inspected?
Grass Valley was last inspected on July 5, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.