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 1451–1475 of 2,306
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Olson Ranches INC. #2 Jones County | 29 | 1958 | Low | Not Rated |
| Olson Ranches INC. #3 Jones County | 25 | 1956 | Low | Not Rated |
| Olson Ranches INC. #4 Jones County | 25 | 1966 | Low | Not Rated |
| Olson Ranches INC. #5 Jones County | 31 | 1959 | Low | Not Rated |
| Olson Ranches INC. #7 Jones County | 25 | 1956 | Low | Not Rated |
| Olson Ranches INC. #8 Jones County | 28 | 1955 | Low | Not Rated |
| Olson Ranches INC. #9 Jones County | 26 | 1956 | Low | Not Rated |
| Olson Ranches No. 5 Jones County | 26 | 1979 | Low | Not Rated |
| Olson Ranch INC. #6 Jones County | 26 | 1959 | Low | Not Rated |
| Onida Feeders Dam Sully County | 13 | 1976 | Low | Not Rated |
| Ortman Dam McCook County | 22 | 2001 | Low | Not Rated |
| Osborne #1 Jones County | 26 | 1961 | Low | Not Rated |
| Osborne Number 2 Jones County | 19 | 1959 | Low | Not Rated |
| Osborne Number 3 Jones County | 28 | 1953 | Low | Not Rated |
| Oscar Diess Lyman County | 22 | 1953 | Low | Not Rated |
| Oscar Micheaux Dam Gregory County | 40 | 1974 | Low | Not Rated |
| Oscar Rische Corson County | 22 | 1970 | Low | Not Rated |
| Osceola Kingsbury County | 18 | 1930 | Low | Not Rated |
| Oswald No. 1 Mellette County | 25 | 1968 | Low | Not Rated |
| Oswarld Number 2 Mellette County | 27 | 1964 | Low | Not Rated |
| Otto Dietterle Corson County | 16 | 1938 | Low | Not Rated |
| Otto Ericson Dam No. 1 Butte County | 10 | 1948 | Low | Not Rated |
| Otto Schmidt Stanley County | 19 | 1956 | Low | Not Rated |
| Overberg Wpa #1 Roberts County | 8 | 1979 | Low | Not Rated |
| Overberg Wpa #2 Roberts County | 7 | 1979 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.