Stephen Mission is an earth dam located in Hyde County, South Dakota, built in 1943. It carries a Low hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall and 540 ft long, taller than 55% 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 water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Crow Creek Tribe (federal). It impounds the Campbell Creek.
The dam stands 26 feet tall and stretches 540 feet across, and has a maximum storage capacity of 260 acre-feet. Completed in 1943, 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.
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Location
| State | South Dakota |
| County | Hyde |
| Nearest City | None |
| River/Stream | Campbell Creek |
| Coordinates | 44.22166, -99.46332 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 540 ft |
| Year Completed | 1943 (83 years old) |
Storage & Hydraulics
| NID Storage | 260 acre-ft |
| Max Storage | 260 acre-ft |
| Normal Storage | 122 acre-ft |
| Max Discharge | 9,030 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Crow Creek Tribe |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00291 |
| Federal ID | SD00291 |
| More Info | State Dam Safety Program |