Big Wash Flood Control
Big Wash Flood Control is an earth dam located in Beaver County, Utah, built in 1961. It carries a Significant hazard potential classification.
About Big Wash Flood Control
The primary purpose of Big Wash Flood Control 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 Beaver County (local government). It impounds the Big Wash near Milford.
The dam stands 49 feet tall and stretches 6,465 feet across, has a maximum storage capacity of 1,700 acre-feet, and collects water from a drainage area of 63 square miles. Completed in 1961, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
At 49 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Utah |
| County | Beaver |
| Nearest City | Milford |
| River/Stream | Big Wash |
| Coordinates | 38.42183, -113.03912 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 49 ft |
| Dam Length | 6,465 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 1,700 acre-ft |
| Max Storage | 1,700 acre-ft |
| Normal Storage | 325 acre-ft |
| Drainage Area | 63 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | BEAVER COUNTY |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Emergency Action Plan | No |
Identifiers
| NID ID | UT00403 |
| Federal ID | UT00403 |
| More Info | State Dam Safety Program |