33Total Dams
7High Hazard
5Significant
Dam Safety in Custer County, South Dakota
Custer County has 33 dams tracked in the National Inventory of Dams. Of these, 7 are classified as high hazard — meaning failure would probably cause loss of human life. Another 5 carry a significant hazard classification. Currently, 1 dam has a condition assessment of poor or unsatisfactory.
The average dam in Custer County is 75 years old. The most common purpose is fire protection, stock, or small fish pond. The tallest dam is Center Lake Dam at 56 ft.
Explore more: Oldest dams in South Dakota · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Center Lake Dam | High | Fair | 56 | Recreation | 1935 |
| Stockade Lake Dam | High | Fair | 53 | Recreation | 1930 |
| Lakota | High | Not assessed | 47 | Recreation | 1962 |
| Bismark Lake | High | Not assessed | 40 | Recreation | 1937 |
| Legion Lake Dam | High | Fair | 38 | Recreation | 1934 |
| Sylvan Lake Dam | High | Fair | 37 | Recreation | 1906 |
| Custer West | High | Unsatisfactory | 13 | Recreation | 1943 |
| Gregorson No.1 | Significant | Not assessed | 34 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| Rasmussen No.1 | Significant | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1943 |
| Circle C No.2 | Significant | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Smith No.1 | Significant | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1972 |
| Streeter Dam | Significant | Not assessed | 22 | Fire Protection, Stock, Or Small Fish Pond | 1945 |
| Triple 7 Ranch Dam | Low | Not assessed | 32 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| M. Scism No.1 | Low | Not assessed | 28 | Irrigation | 1973 |
| Brophy Big Dam | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1945 |
| Pat Brown | Low | Not assessed | 28 | Fish and Wildlife Pond | 1998 |
| M. Scism No.2 | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1946 |
| County Line Dam | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1945 |
| C. Peterson | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1958 |
| Wilson Ranch Dam | Low | Not assessed | 24 | Fire Protection, Stock, Or Small Fish Pond | 1940 |
| Harrison No.1 | Low | Not assessed | 23 | Fire Protection, Stock, Or Small Fish Pond | 1959 |
| Triple Seven No.2 | Low | Not assessed | 23 | Fire Protection, Stock, Or Small Fish Pond | 1947 |
| Evans No.1 | Low | Not assessed | 21 | Fire Protection, Stock, Or Small Fish Pond | 1951 |
| Earl Witte No.1 | Low | Not assessed | 21 | Fire Protection, Stock, Or Small Fish Pond | 1960 |
| G. Flier | Low | Not assessed | 19 | Irrigation | 1958 |
| Barta Crooked Dam | Low | Not assessed | 19 | Fire Protection, Stock, Or Small Fish Pond | 1950 |
| Englebrecht Dam | Low | Not assessed | 18 | Fire Protection, Stock, Or Small Fish Pond | 1945 |
| Triple Seven No.1 | Low | Not assessed | 18 | Fire Protection, Stock, Or Small Fish Pond | 1947 |
| Circle C No.1 | Low | Not assessed | 18 | Fire Protection, Stock, Or Small Fish Pond | 1951 |
| Ray E. Smith Dam | Low | Not assessed | 18 | Fire Protection, Stock, Or Small Fish Pond | 1954 |
| Evans No.2 | Low | Not assessed | 15 | Fire Protection, Stock, Or Small Fish Pond | 1960 |
| Schnose Dam No.2 | Low | Not assessed | 15 | Fire Protection, Stock, Or Small Fish Pond | 1947 |
| Schnose Dam No.1 | Low | Not assessed | 14 | Fire Protection, Stock, Or Small Fish Pond | 1945 |