Grantsville
Key Takeaway
Grantsville is classified as high hazard in Utah. It was completed in 1984 and is 42 years old. Its primary use is irrigation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Length | 5,376 ft |
| Dam Type | Earth |
| Max Storage | 3.9K acre-ft |
| Normal Storage | 3.4K acre-ft |
| Drainage Area | 3 sq mi |
| Max Discharge | 159 cfs |
| Year Completed | 1984 (42 years old) |
| NID ID | UT00343 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
GRANTSVILLE IRRIGATION COMPANY
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Grantsville?
Grantsville is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Grantsville?
Grantsville is owned by GRANTSVILLE IRRIGATION COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grantsville built?
Grantsville was completed in 1984, making it 42 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 Grantsville?
Grantsville serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Grantsville last inspected?
Grantsville was last inspected on July 18, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.