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 1–9 of 9
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Elm Lake Dam Brown County | 52 | 1937 | High | Satisfactory |
| Grizzly Gulch Tailings Dam Lawrence County | 380 | 1998 | High | Satisfactory |
| He Dog Todd County | 41 | 1936 | High | Satisfactory |
| Indian Scout Todd County | 50 | 2010 | High | Satisfactory |
| Kyle Oglala Lakota County | 37 | 1935 | High | Satisfactory |
| Lacreek Dam No. 8 Bennett County | 12 | 1934 | Low | Satisfactory |
| Ponca Gregory County | 45 | 1935 | High | Satisfactory |
| Rosebud Todd County | 37 | 1935 | High | Satisfactory |
| Sully 2 Todd County | 29 | 1935 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.