Hyrum
LITTLE BEAR RIVER·
Cache, Utah·
Built 1934·
Earth·
116 ft tall
Physical Details
| Dam Height | 116 ft (taller than 70.6% in UT) |
| Dam Length | 540 ft |
| Dam Type | Earth |
| Max Storage | 18.7K acre-ft |
| Normal Storage | 18.7K acre-ft |
| Surface Area | 480 acres |
| Drainage Area | 220 sq mi |
| Max Discharge | 6,000 cfs |
| Year Completed | 1934 (92 years old) |
| NID ID | UT10123 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: August 27, 2020
State Regulated: No
Ownership
RECLAMATION
Federal Government
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Significant HazardFrequently Asked Questions
What is the hazard classification of Hyrum?
Hyrum is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Hyrum?
Hyrum is owned by RECLAMATION (Federal Government).
When was Hyrum last inspected?
Hyrum was last inspected on August 27, 2020.
When was Hyrum built?
Hyrum was completed in 1934, making it 92 years old.
Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.