South Branch 27
South Branch 27 is an earth dam located in Johnson County, Nebraska, built in 1994. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About South Branch 27
The primary purpose of South Branch 27 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 Nemaha Natural Resources District (local government). It impounds the Tr-s Fk Little Nemaha River near Brock.
The dam stands 37 feet tall and stretches 1,055 feet across, creates a reservoir covering 36 acres, has a maximum storage capacity of 1,094 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1994, the structure is 32 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 06/10/2021.
At 37 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Nebraska |
| County | Johnson |
| Nearest City | Brock |
| River/Stream | Tr-s Fk Little Nemaha River |
| Coordinates | 40.45245, -96.20119 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 37 ft |
| Dam Height | 30 ft |
| Dam Length | 1,055 ft |
| Year Completed | 1994 (32 years old) |
Storage & Hydraulics
| NID Storage | 1,094 acre-ft |
| Max Storage | 1,094 acre-ft |
| Normal Storage | 163 acre-ft |
| Surface Area | 36 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,476 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/10/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02476 |
| Federal ID | NE02476 |
| More Info | State Dam Safety Program |