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 26–50 of 2,306
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Wm T Malloy Perkins County | 22 | 1953 | Low | Not Rated |
| Wm Kary #2 Mellette County | 13 | 1956 | Low | Not Rated |
| W. Mann No.3 Meade County | 15 | 1956 | Low | Not Rated |
| W. Mann No.2 Meade County | 16 | 1947 | Low | Not Rated |
| W. Mann No.1 Meade County | 17 | 1948 | Low | Not Rated |
| W. Knox Hyde County | 24 | 1941 | Low | Not Rated |
| W. Jordan Meade County | 19 | 1949 | Low | Not Rated |
| W. J. Asmussen Hyde County | 21 | 1946 | Low | Not Rated |
| Witcher Holes Dam Haakon County | 15 | 1958 | Low | Not Rated |
| Winter Dam Brookings County | 10 | 2002 | Low | Not Rated |
| Winchell Bros. No.1 Mellette County | 25 | 1958 | Low | Not Rated |
| Wilson Ranch Dam Meade County | 13 | 1958 | Low | Not Rated |
| Wilson Ranch Dam Custer County | 24 | 1940 | Low | Not Rated |
| Wilson Number 1 Jones County | 27 | 1953 | Low | Not Rated |
| Wilson No.2 Harding County | 26 | 1960 | Low | Not Rated |
| Wilmarth Aurora County | 31 | 1937 | Low | Not Rated |
| Williamson Dam Meade County | 16 | 1984 | Low | Not Rated |
| Williams No 3 (Nid) Stanley County | 23 | 1938 | Low | Not Rated |
| Williams No.1 Mellette County | 25 | 1967 | Low | Not Rated |
| William Smith Lyman County | 24 | 1956 | Low | Not Rated |
| Williams Dam Fall River County | 15 | 1935 | Low | Not Rated |
| Williams Dam Bon Homme County | 24 | 2009 | Low | Not Rated |
| Williams Dam Edmunds County | 12 | 1994 | Low | Not Rated |
| Williams 783 Stanley County | 14 | 1938 | Low | Not Rated |
| William P. Ransch Potter County | 12 | 1941 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.