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 1976–2000 of 2,306
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Shyne 1 Pennington County | 25 | 1953 | Low | Not Rated |
| Sieler Dam Pennington County | 20 | 1955 | Low | Not Rated |
| Silbernagel Dam Meade County | 20 | 2000 | Low | Not Rated |
| Silver Creek No. 1 Minnehaha County | 21 | 1960 | Low | Not Rated |
| Silver Creek No. 2 Minnehaha County | 27 | 1963 | Low | Not Rated |
| Silver Creek No. 3 Minnehaha County | 27 | 1973 | Low | Not Rated |
| Silver Creek No. 4 Minnehaha County | 26 | 1963 | Low | Not Rated |
| Silver Creek No. 5 Minnehaha County | 22 | 1960 | Low | Not Rated |
| Silver Creek No. 6 Minnehaha County | 24 | 1973 | Low | Not Rated |
| Simon Dam Potter County | 21 | 1936 | Low | Not Rated |
| Simons Meade County | 29 | 1997 | Low | Not Rated |
| Simons Bros. Perkins County | 17 | 1952 | Low | Not Rated |
| Simons Pond Fall River County | 24 | 1956 | Low | Not Rated |
| Simpson Bros. Perkins County | 19 | 1972 | Low | Not Rated |
| Singletary Dam Jackson County | 25 | 1976 | Low | Not Rated |
| Sioux Poinsett Gpa Hamlin County | 11 | 1995 | Low | Not Rated |
| Skull Creek Dam Harding County | 20 | 1950 | Low | Not Rated |
| Sladek Dam Brule County | 26 | 1949 | Low | Not Rated |
| Sletto #1 Jones County | 26 | 1956 | Low | Not Rated |
| Smaltz Bros. Perkins County | 20 | 1951 | Low | Not Rated |
| Smith and Brost Number 1 Jones County | 32 | 1965 | Low | Not Rated |
| Smith Andy Number 1 Mellette County | 28 | 1968 | Low | Not Rated |
| Smith Dam Lyman County | 43 | 2006 | Low | Not Rated |
| Smith Dam Lyman County | 20 | 1960 | Low | Not Rated |
| Snake Creek Rec. Area Dam Charles Mix County | 32 | 1995 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.