South Fork 1-1 is an earth dam located in Pawnee County, Nebraska, built in 1981. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 39 ft39 ft tall and 900 ft long, taller than 85% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About South Fork 1-1
South Fork 1-1 is a dam in Pawnee, Nebraska. The dam is owned by Nemaha Natural Resources District (local government). It impounds the Tr-lores Br Big Nemaha River near Dubois.
The dam stands 39 feet tall and stretches 900 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 147 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1981, the structure is 45 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/12/2022.
At 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Nebraska |
| County | Pawnee |
| Nearest City | Dubois |
| River/Stream | Tr-lores Br Big Nemaha River |
| Coordinates | 40.02337, -96.05248 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 35 ft |
| Dam Length | 900 ft |
| Year Completed | 1981 (45 years old) |
Storage & Hydraulics
| NID Storage | 147 acre-ft |
| Max Storage | 147 acre-ft |
| Normal Storage | 64 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 487 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/12/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01802 |
| Federal ID | NE01802 |
| More Info | State Dam Safety Program |