South Dakota Dams
2,541 dams tracked by the National Inventory of Dams
Total Dams
2,541
High Hazard
86
3.4%
Poor / Unsatisfactory
34
Average Age
68 yrs
Hazard Classification
High86 (3.4%)
Significant149 (5.9%)
Low2,306 (90.8%)
Condition Assessment
Satisfactory9 (0.4%)
Fair41 (1.6%)
Poor / Unsatisfactory34 (1.3%)
Not Rated2,457 (96.7%)
Federal
158
State
171
Local
84
Private
2,125
Tallest Dams
- Grizzly Gulch Tailings Dam380 ft
- Oahe Dam245 ft
- Big Bend Dam205 ft
- Angostura Dam193 ft
- Deerfield Dam171 ft
High Hazard Dams
- Grizzly Gulch Tailings DamHigh
- Oahe DamHigh
- Big Bend DamHigh
- Angostura DamHigh
- Deerfield DamHigh
Poor Condition Dams
- OglalaUnsatisfactory
- MarindahlPoor
- Crow CreekPoor
- RichmondPoor
- Ghost HawkUnsatisfactory
All Dams in South Dakota
Showing 2276–2300 of 2,541
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Stromer Herman No.1 Mellette County | 28 | 1963 | Low | Not Rated |
| Stromer Herman No.2 Mellette County | 36 | 1964 | Low | Not Rated |
| Strong 2 Meade County | 11 | 1960 | Low | Not Rated |
| Sturgis #2 Meade County | 30 | 1894 | Significant | Not Rated |
| Sturgis #4 Meade County | 37 | 1929 | Significant | Not Rated |
| Sturgis #5 Meade County | 44 | 1959 | Significant | Not Rated |
| Styles Number 1 Jones County | 16 | 1937 | Low | Not Rated |
| Sully 2 Todd County | 29 | 1935 | High | Satisfactory |
| Sully Dam Sully County | 22 | 1938 | Low | Not Rated |
| Sully Dam Tripp County | 17 | 1935 | Low | Not Rated |
| Summit Lyman County | 18 | 1938 | Low | Not Rated |
| Sundell Dam Tripp County | 20 | 1935 | Low | Not Rated |
| Sunshine Haakon County | 33 | 1933 | Low | Not Rated |
| Sutton Bay Dam Sully County | 37 | 2002 | Low | Not Rated |
| Swayze Irr. Dam Roberts County | 21 | 1981 | Low | Not Rated |
| Swayze Irr. Dam #2 Roberts County | 24 | 1980 | Low | Not Rated |
| Sylvan Lake Dam Custer County | 37 | 1906 | High | Fair |
| Tacoma Park Brown County | 20 | 1935 | Low | Not Rated |
| Tadpole Harding County | 20 | 1952 | Low | Not Rated |
| Talley Dam Perkins County | 19 | 1950 | Low | Not Rated |
| Talley Dam Meade County | 22 | 1938 | Low | Not Rated |
| Tate Dam Todd County | 14 | 1986 | Low | Not Rated |
| Taylor Brothers Sully County | 18 | 1947 | Low | Not Rated |
| Ted Matson Harding County | 19 | 1968 | Low | Not Rated |
| Ted Molstad Dam Walworth County | 23 | 1951 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.