Scott Creek Watershed No. 11 is an earth dam located in Union County, South Dakota, built in 1955. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 820 ft long, taller than 65% 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 Scott Creek Watershed No. 11
The primary purpose of Scott Creek Watershed No. 11 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 Scott Creek Watershed District (local government). It impounds the Scott Creek near North Sioux City.
The dam stands 29 feet tall and stretches 820 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 355 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1955, 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.
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Location
| State | South Dakota |
| County | Union |
| Nearest City | North Sioux City |
| River/Stream | Scott Creek |
| Coordinates | 42.96166, -96.53925 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 820 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 355 acre-ft |
| Max Storage | 355 acre-ft |
| Normal Storage | 17 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 3,230 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Scott Creek Watershed District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02270 |
| Federal ID | SD02270 |
| More Info | State Dam Safety Program |