Gunlock
Key Takeaway
Gunlock is classified as high hazard in Utah. It was completed in 1970 and is 56 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 | 1,400 ft |
| Dam Type | Earth |
| Max Storage | 15.0K acre-ft |
| Normal Storage | 10.9K acre-ft |
| Drainage Area | 306 sq mi |
| Max Discharge | 140 cfs |
| Year Completed | 1970 (56 years old) |
| NID ID | UT00129 |
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
LOWER GUNLOCK RESERVOIR CORPORATION
Private
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High HazardFrequently Asked Questions
What is the hazard classification of Gunlock?
Gunlock 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 Gunlock?
Gunlock is owned by LOWER GUNLOCK RESERVOIR CORPORATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gunlock built?
Gunlock was completed in 1970, making it 56 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 Gunlock?
Gunlock 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 Gunlock last inspected?
Gunlock was last inspected on April 5, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.