Spring-bull 1 is an earth dam located in Charles Mix County, South Dakota, built in 1973. It carries a Significant hazard potential classification.
Dam profile
NID height · 64 ft64 ft tall and 911 ft long, taller than 96% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Spring-bull 1
The primary purpose of Spring-bull 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 Spring-bull Creek Watershed District (local government). It impounds the Spring Creek near Springfield.
The dam stands 64 feet tall and stretches 911 feet across, creates a reservoir covering 30 acres, has a maximum storage capacity of 3,370 acre-feet, and collects water from a drainage area of 17 square miles. Completed in 1973, 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. The most recent inspection on record was 11/20/1980. That was over 45 years ago.
At 64 feet, this dam is taller than 96% of all dams in the United States.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Charles Mix |
| Nearest City | Springfield |
| River/Stream | Spring Creek |
| Coordinates | 42.89348, -98.23796 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 64 ft |
| Dam Height | 64 ft |
| Dam Length | 911 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 3,370 acre-ft |
| Max Storage | 3,370 acre-ft |
| Normal Storage | 235 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 17 sq mi |
| Max Discharge | 15,424 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Spring-bull Creek Watershed District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 11/20/1980 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02272 |
| Federal ID | SD02272 |
| More Info | State Dam Safety Program |