Rude Hasvold Road Dam is an earth dam located in Grant County, South Dakota, built in 1970. It carries a Significant hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 675 ft long, taller than 74% 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 Rude Hasvold Road Dam
The primary purpose of Rude Hasvold Road Dam 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 H.e. Rude and V. Hasvold (private). It impounds the Tributary of Whetstone River near Marvin.
The dam stands 32 feet tall and stretches 675 feet across, and has a maximum storage capacity of 126 acre-feet. Completed in 1970, 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.
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Location
| State | South Dakota |
| County | Grant |
| Nearest City | Marvin |
| River/Stream | Tributary of Whetstone River |
| Coordinates | 45.25229, -96.92412 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 675 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 126 acre-ft |
| Max Storage | 126 acre-ft |
| Normal Storage | 13 acre-ft |
| Max Discharge | 55 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | H.e. Rude and V. Hasvold |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00325 |
| Federal ID | SD00325 |
| More Info | State Dam Safety Program |