Dunlap Dam 1 is an earth dam located in Sioux County, Nebraska, built in 1952. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 708 ft long. 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 Dunlap Dam 1
The primary purpose of Dunlap Dam 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Spearhead Ranch LLC (private). It impounds the Tr-south Antelope Creek near Ardmore Sd.
The dam stands 18 feet tall and stretches 708 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 69 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1952, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/02/2023.
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Location
| State | Nebraska |
| County | Sioux |
| Nearest City | Ardmore Sd |
| River/Stream | Tr-south Antelope Creek |
| Coordinates | 42.92075, -103.91156 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 708 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 69 acre-ft |
| Max Storage | 69 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 450 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Spearhead Ranch LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/02/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02103 |
| Federal ID | NE02103 |
| More Info | State Dam Safety Program |