Ransom Dam 1747
Ransom Dam 1747 is an earth dam located in Polk County, Nebraska, built in 1979. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Ransom Dam 1747
The primary purpose of Ransom Dam 1747 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 Upper Big Blue Natural Resources District (local government). It impounds the Tr-big Blue River near Surprise.
The dam stands 32 feet tall and stretches 555 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 86 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1979, the structure is 47 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 06/29/2022.
At 32 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Nebraska |
| County | Polk |
| Nearest City | Surprise |
| River/Stream | Tr-big Blue River |
| Coordinates | 41.14841, -97.52459 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 26 ft |
| Dam Length | 555 ft |
| Year Completed | 1979 (47 years old) |
Storage & Hydraulics
| NID Storage | 86 acre-ft |
| Max Storage | 86 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 43 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Upper Big Blue Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/29/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01747 |
| Federal ID | NE01747 |
| More Info | State Dam Safety Program |