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 1551–1575 of 2,541
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Nygaard Trout Dam Harding County | 21 | 1956 | Low | Not Rated |
| Oahe Dam Stanley County | 245 | 1966 | High | Not Available |
| Oahe Dam - Spring Creek Dam Campbell County | 40 | 1961 | Low | Not Available |
| O'Connell Dam Haakon County | 32 | 1999 | Significant | Not Rated |
| Odou Patterson Perkins County | 39 | 1952 | Low | Not Rated |
| O. Drageset Ziebach County | 14 | 1955 | Low | Not Rated |
| O. Drageset No.1 Ziebach County | 18 | 1948 | Low | Not Rated |
| O. Drageset No.2 Ziebach County | 22 | 1953 | Low | Not Rated |
| O'Farrell Dam No. 1 Grant County | 20 | 2005 | Low | Not Rated |
| O'Farrell Dam No. 2 Grant County | 20 | 2006 | Low | Not Rated |
| Oglala Oglala Lakota County | 62 | 1941 | High | Unsatisfactory |
| Ogren Dam Marshall County | 24 | 1993 | Low | Not Rated |
| Ogren Dam No. 2 Marshall County | 22 | 2009 | Low | Not Rated |
| Oil Well Dam No.1 Fall River County | 12 | 1945 | Low | Not Rated |
| Oil Well Dam No. 2 Fall River County | 15 | 1949 | Low | Not Rated |
| Oja No.1 Harding County | 25 | 1953 | Low | Not Rated |
| Oja No.2 Harding County | 13 | 1949 | Low | Not Rated |
| O. Jewett Dewey County | 19 | 1936 | Low | Not Rated |
| Okaton Dam Jones County | 22 | 1930 | Low | Not Rated |
| Old Stickney Aurora County | 10 | 1926 | Low | Not Rated |
| Old Town Dam Pennington County | 14 | 1941 | Low | Not Rated |
| Oleary Dewey County | 15 | 1945 | Low | Not Rated |
| Oleary Ranch 1 Dewey County | 31 | 1969 | Low | Not Rated |
| Oleary Ranch 2 Dewey County | 23 | 1969 | Low | Not Rated |
| Ole Lake Dam Kingsbury County | 8 | 1990 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.