Mirage Flats Dam
Mirage Flats Dam is an earth dam located in Dawes County, Nebraska, built in 1973. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Mirage Flats Dam
The primary purpose of Mirage Flats Dam 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 Dawes County Road Department (private). It impounds the Unnamed Creek near Valentine.
The dam stands 48 feet tall and stretches 1,970 feet across, creates a reservoir covering 48 acres, has a maximum storage capacity of 2,430 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1973, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 07/10/2019.
At 48 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Nebraska |
| County | Dawes |
| Nearest City | Valentine |
| River/Stream | Unnamed Creek |
| Coordinates | 42.55810, -102.78943 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 48 ft |
| Dam Height | 40 ft |
| Dam Length | 1,970 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 2,430 acre-ft |
| Max Storage | 2,430 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 48 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 7,251 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Dawes County Road Department |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/10/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00822 |
| Federal ID | NE00822 |
| More Info | State Dam Safety Program |