Hurley is an earth dam located in Potter County, South Dakota, built in 1933. It carries a Significant hazard potential classification.
Dam profile
NID height · 46 ft46 ft tall and 675 ft long, taller than 91% 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 Hurley
The primary purpose of Hurley is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Gf&p (state). It impounds the Cheyenne Creek.
The dam stands 46 feet tall and stretches 675 feet across, creates a reservoir covering 55 acres, has a maximum storage capacity of 4,125 acre-feet, and collects water from a drainage area of 74 square miles. Completed in 1933, the structure is well-established, with more than 75 years of service.
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 07/28/2022.
At 46 feet, this dam is taller than 91% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Potter |
| Nearest City | None |
| River/Stream | Cheyenne Creek |
| Coordinates | 45.08942, -100.15568 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 46 ft |
| Dam Length | 675 ft |
| Year Completed | 1933 (93 years old) |
Storage & Hydraulics
| NID Storage | 4,125 acre-ft |
| Max Storage | 4,125 acre-ft |
| Normal Storage | 2,100 acre-ft |
| Surface Area | 55 acres |
| Drainage Area | 74 sq mi |
| Max Discharge | 6,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Gf&p |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/28/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00037 |
| Federal ID | SD00037 |
| More Info | State Dam Safety Program |