Merlin Mader Dam 1 is an earth dam located in Sioux County, Nebraska, built in 1961. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 595 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 Merlin Mader Dam 1
The primary purpose of Merlin Mader Dam 1 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 Philip & Shelley Sweetman Revocable Trusts (private). It impounds the Tr-indian Creek near Ardmore Sd.
The dam stands 23 feet tall and stretches 595 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 151 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 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. The most recent inspection on record was 08/26/2019.
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Location
| State | Nebraska |
| County | Sioux |
| Nearest City | Ardmore Sd |
| River/Stream | Tr-indian Creek |
| Coordinates | 42.98373, -103.79105 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 21 ft |
| Dam Length | 595 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 151 acre-ft |
| Max Storage | 151 acre-ft |
| Normal Storage | 115 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 286 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Philip & Shelley Sweetman Revocable Trusts |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/26/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01126 |
| Federal ID | NE01126 |
| More Info | State Dam Safety Program |