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 2126–2150 of 2,306
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Tribe No.6 Ziebach County | 21 | 1947 | Low | Not Rated |
| Tribe No.7 Ziebach County | 26 | 1960 | Low | Not Rated |
| Tribe No.8 Ziebach County | 23 | 1959 | Low | Not Rated |
| Tribe No.9 Ziebach County | 21 | 1959 | Low | Not Rated |
| Triple 7 Ranch Dam Custer County | 32 | 1963 | Low | Not Rated |
| Triple Seven No.1 Custer County | 18 | 1947 | Low | Not Rated |
| Triple Seven No.2 Custer County | 23 | 1947 | Low | Not Rated |
| Tripp Hutchinson County | 27 | 1934 | Low | Not Rated |
| Trotter Ranch Dam Fall River County | 11 | 1957 | Low | Not Rated |
| Trout Dam Fall River County | 22 | 1920 | Low | Not Rated |
| Truman Dam Harding County | 20 | 1950 | Low | Not Rated |
| T. Sternard Meade County | 21 | 1938 | Low | Not Rated |
| T. Trent No.1 Ziebach County | 21 | 1948 | Low | Not Rated |
| Tubbs Moss Agate Dam Fall River County | 36 | 1947 | Low | Not Rated |
| Tufte Dam Harding County | 20 | 1955 | Low | Not Rated |
| Turbiville Irrigation Harding County | 20 | 1950 | Low | Not Rated |
| Turtle Creek Dam Harding County | 21 | 1948 | Low | Not Rated |
| Tvinnereim Trust Dam Day County | 8 | 2015 | Low | Not Rated |
| Two Bar Two Grazing Association Dam Edmunds County | 14 | 1994 | Low | Not Rated |
| Two Buttes Dam Perkins County | 19 | 1962 | Low | Not Rated |
| Tyler Dam Marshall County | 34 | 1996 | Low | Not Rated |
| Udager Dam Meade County | 20 | 1948 | Low | Not Rated |
| Ulmer Dam Hutchinson County | 31 | 1975 | Low | Not Rated |
| Union Creek No 12 Union County | 37 | 1976 | Low | Not Rated |
| Union Creek No 48 Union County | 37 | 1976 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.