Hilda Norman Dam 3
Hilda Norman Dam 3 is an earth dam located in Sioux County, Nebraska, built in 1961. It carries a Significant hazard potential classification and has a poor condition assessment.
About Hilda Norman Dam 3
The primary purpose of Hilda Norman Dam 3 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Jean Norman (private). It impounds the Tr-big Cottonwood Creek near Interior Sd.
The dam stands 18 feet tall and stretches 1,992 feet across, creates a reservoir covering 51 acres, has a maximum storage capacity of 441 acre-feet, and collects water from a drainage area of 1 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. 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 06/08/2023.
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Location
| State | Nebraska |
| County | Sioux |
| Nearest City | Interior Sd |
| River/Stream | Tr-big Cottonwood Creek |
| Coordinates | 42.85271, -103.54901 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 14 ft |
| Dam Length | 1,992 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 441 acre-ft |
| Max Storage | 441 acre-ft |
| Normal Storage | 170 acre-ft |
| Surface Area | 51 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 6,289 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Jean Norman |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 06/08/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01128 |
| Federal ID | NE01128 |
| More Info | State Dam Safety Program |