Frog Hollow
Frog Hollow is an earth dam located in Washington County, Utah, built in 1978. It carries a High hazard potential classification and has a poor condition assessment.
About Frog Hollow
The primary purpose of Frog Hollow is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Hurricane City (private). It impounds the Frog Hollow near Hurricane.
The dam stands 58 feet tall and stretches 1,982 feet across, has a maximum storage capacity of 2,000 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1978, the structure is 48 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 08/10/2023.
At 58 feet, this dam is taller than 95% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Utah dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Utah |
| County | Washington |
| Nearest City | Hurricane |
| River/Stream | Frog Hollow |
| Coordinates | 37.12113, -113.26304 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 58 ft |
| Dam Length | 1,982 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 2,000 acre-ft |
| Max Storage | 2,000 acre-ft |
| Normal Storage | 1,450 acre-ft |
| Drainage Area | 12 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | HURRICANE CITY |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 08/10/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | UT00418 |
| Federal ID | UT00418 |
| More Info | State Dam Safety Program |