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 2101–2125 of 2,306
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Thorstensen 1 Dewey County | 26 | 1968 | Low | Not Rated |
| Thorstensen 2 Dewey County | 28 | 1972 | Low | Not Rated |
| Thorstensen 3 Dewey County | 25 | 1969 | Low | Not Rated |
| Tift Dam Meade County | 32 | 1979 | Low | Not Rated |
| Timber Lake Cattle CO 3 Dewey County | 32 | 1970 | Low | Not Rated |
| Timmons Wetland Dam Meade County | 22 | 1995 | Low | Not Rated |
| Tisdale Lake Meade County | 30 | 1935 | Low | Not Rated |
| T. Jennings Hyde County | 20 | 1946 | Low | Not Rated |
| T. Mahaffey Meade County | 26 | 1948 | Low | Not Rated |
| T. Mason Meade County | 13 | 1962 | Low | Not Rated |
| Tom Gabbert Perkins County | 28 | 1957 | Low | Not Rated |
| Tom Hauk No.1 Walworth County | 27 | 1952 | Low | Not Rated |
| Tom Mason Perkins County | 18 | 1955 | Low | Not Rated |
| Tony Krebs Pennington County | 14 | 1958 | Low | Not Rated |
| Tornow No. 2 Jones County | 26 | 1976 | Low | Not Rated |
| Tornow Number 1 Jones County | 27 | 1969 | Low | Not Rated |
| Tower Dam Todd County | 20 | 1934 | Low | Not Rated |
| Trail City Dam Corson County | 24 | 1935 | Low | Not Rated |
| Tribal Stanley County | 24 | 1957 | Low | Not Rated |
| Tribe No.1 Ziebach County | 20 | 1948 | Low | Not Rated |
| Tribe No.10 Ziebach County | 23 | 1957 | Low | Not Rated |
| Tribe No.11 Ziebach County | 28 | 1960 | Low | Not Rated |
| Tribe No.2 Ziebach County | 23 | 1956 | Low | Not Rated |
| Tribe No.3 Ziebach County | 20 | 1952 | Low | Not Rated |
| Tribe No.4 Ziebach County | 28 | 1961 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.