Grass Valley East Dike
Key Takeaway
Grass Valley East Dike is classified as significant hazard in Colorado. It was completed in 1946 and is 80 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 12 ft (taller than 11% in CO) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 2.1K acre-ft |
| Normal Storage | 1.1K acre-ft |
| Surface Area | 212 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 462 cfs |
| Year Completed | 1946 (80 years old) |
| NID ID | CO02887 |
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
SILT WATER CONSERVANCY DISTRICT
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Grass Valley East Dike?
Grass Valley East Dike 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 East Dike?
Grass Valley East Dike is owned by SILT WATER CONSERVANCY DISTRICT (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grass Valley East Dike built?
Grass Valley East Dike was completed in 1946, making it 80 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 East Dike?
Grass Valley East Dike serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Grass Valley East Dike?
Grass Valley East Dike has a dam height of 12 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 Grass Valley East Dike last inspected?
Grass Valley East Dike was last inspected on April 6, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.