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 326–350 of 2,541
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sorum Dam Perkins County | 33 | 1934 | Low | Not Rated |
| Sorenson Turner County | 25 | 1964 | Low | Not Rated |
| Sonnenschien Number 3 Stanley County | 37 | 1972 | Low | Not Rated |
| Sonnenschein Number 2 Stanley County | 42 | 1963 | Significant | Not Rated |
| Sonnenschein Number 1 Stanley County | 26 | 1963 | Low | Not Rated |
| Solberg Dam Roberts County | 27 | 2009 | Low | Not Rated |
| So Hand Grazing Assn Hyde County | 15 | 1948 | Low | Not Rated |
| Snow Dam Tripp County | 23 | 1934 | Low | Not Rated |
| Snook Meade County | 28 | 1960 | Low | Not Rated |
| Snavely No. 2 Tripp County | 24 | — | Low | Not Rated |
| Snavely No. 1 Tripp County | 25 | — | Low | Not Rated |
| Snake Creek Rec. Area Dam Charles Mix County | 32 | 1995 | Low | Not Rated |
| Smith Spreader Dam Harding County | 15 | 1948 | Significant | Not Rated |
| Smith Ranch Dam Haakon County | 19 | 1953 | Significant | Not Rated |
| Smith No.1 Custer County | 28 | 1972 | Significant | Not Rated |
| Smith Dam Lyman County | 20 | 1960 | Low | Not Rated |
| Smith Dam Lyman County | 43 | 2006 | Low | Not Rated |
| Smith Andy Number 1 Mellette County | 28 | 1968 | Low | Not Rated |
| Smith and Brost Number 1 Jones County | 32 | 1965 | Low | Not Rated |
| Smaltz Bros. Perkins County | 20 | 1951 | Low | Not Rated |
| Sly Number 1 Charles Mix County | 25 | 1961 | Significant | Not Rated |
| Sletto #1 Jones County | 26 | 1956 | Low | Not Rated |
| Sladek Dam Brule County | 26 | 1949 | Low | Not Rated |
| Skull Creek Dam Harding County | 20 | 1950 | Low | Not Rated |
| Sioux Poinsett Gpa Hamlin County | 11 | 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.