Stephen Mission is an earth dam located in Hyde County, South Dakota, built in 1939. It carries a Low hazard potential classification.
Dam profile
NID height · 34 ft34 ft tall and 875 ft long, taller than 78% 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 Stephen Mission
The primary purpose of Stephen Mission is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Crow Creek Tribe (tribal government). It impounds the West Fork Elm Creek.
The dam stands 34 feet tall and stretches 875 feet across, and has a maximum storage capacity of 1,360 acre-feet. Completed in 1939, the structure is well-established, with more than 75 years of service.
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.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | South Dakota |
| County | Hyde |
| Nearest City | None |
| River/Stream | West Fork Elm Creek |
| Coordinates | 44.24017, -99.41337 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 875 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 1,360 acre-ft |
| Max Storage | 1,360 acre-ft |
| Normal Storage | 756 acre-ft |
| Max Discharge | 2,000 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Crow Creek Tribe |
| Owner Type | Tribal Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00290 |
| Federal ID | SD00290 |
| More Info | State Dam Safety Program |