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 2001–2025 of 2,306
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Snavely No. 1 Tripp County | 25 | — | Low | Not Rated |
| Snavely No. 2 Tripp County | 24 | — | Low | Not Rated |
| Snook Meade County | 28 | 1960 | Low | Not Rated |
| Snow Dam Tripp County | 23 | 1934 | Low | Not Rated |
| So Hand Grazing Assn Hyde County | 15 | 1948 | Low | Not Rated |
| Solberg Dam Roberts County | 27 | 2009 | Low | Not Rated |
| Sonnenschein Number 1 Stanley County | 26 | 1963 | Low | Not Rated |
| Sonnenschien Number 3 Stanley County | 37 | 1972 | Low | Not Rated |
| Sorenson Turner County | 25 | 1964 | Low | Not Rated |
| Sorum Dam Perkins County | 33 | 1934 | Low | Not Rated |
| Soske Dam Fall River County | 12 | 1935 | Low | Not Rated |
| South Buttes Harding County | 22 | 1920 | Low | Not Rated |
| South Dam Fall River County | 29 | 1942 | Low | Not Rated |
| South Fork Impoundment Perkins County | 16 | 1992 | Low | Not Rated |
| South Whitewater 251 (Nid) Pennington County | 20 | 1936 | Low | Not Rated |
| Spearfish Valley Ranch Lawrence County | 32 | 1968 | Low | Not Rated |
| Speckels Dam Brule County | 28 | 1952 | Low | Not Rated |
| Spring-Bull 3 Charles Mix County | 38 | 1973 | Low | Not Rated |
| S. Schroder Meade County | 23 | 1969 | Low | Not Rated |
| S. Simon Dam Meade County | 15 | 1946 | Low | Not Rated |
| Staben Dam Haakon County | 16 | 1935 | Low | Not Rated |
| Standing Rock Tribe Corson County | 16 | 1938 | Low | Not Rated |
| Standing Rock Tribe Corson County | 20 | 1940 | Low | Not Rated |
| Stanley Smeenk Dam No. 1 Butte County | 32 | 1950 | Low | Not Rated |
| Star Lake Dam Gregory County | 24 | 1934 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.