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 1526–1550 of 2,541
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Iwan O.M. No.2 Mellette County | 25 | 1961 | Low | Not Rated |
| Iwan No.1 Mellette County | 28 | 1973 | Low | Not Rated |
| Iwan #4 Mellette County | 29 | 1957 | Low | Not Rated |
| Iverson Number 1 Jones County | 26 | 1958 | Low | Not Rated |
| Iverson #1 Jones County | 26 | 1953 | Low | Not Rated |
| Iversen Number 5 Jones County | 30 | 1961 | Low | Not Rated |
| Iversen Number 4 Jones County | 30 | 1954 | Low | Not Rated |
| Iversen Number 3 Jones County | 26 | 1957 | Low | Not Rated |
| Iversen Number 3 Jones County | 32 | 1959 | Low | Not Rated |
| Iversen Number 2 Jones County | 25 | 1958 | Low | Not Rated |
| Iversen Number 2 Jones County | 27 | 1953 | Low | Not Rated |
| Iversen Number 1 Jones County | 25 | 1957 | Low | Not Rated |
| Iversen Number 1 Jones County | 27 | 1959 | Low | Not Rated |
| Iversen Number 1 Jones County | 25 | 1959 | Low | Not Rated |
| Iversen Number 1 Jones County | 25 | 1953 | Low | Not Rated |
| Iversen Dam Jones County | 15 | 1976 | Low | Not Rated |
| Ivan Mills Perkins County | 22 | 1952 | Low | Not Rated |
| I. Thompson Meade County | 16 | 1946 | Low | Not Rated |
| Israel Dam Clay County | 24 | 1989 | Low | Not Rated |
| Isabel Dewey County | 30 | 1935 | High | Fair |
| Irwin Dam Tripp County | 20 | 1938 | Low | Not Rated |
| Iron Cr Lake Lawrence County | 41 | 1937 | High | Not Rated |
| Ireland Dam Jackson County | 16 | 1964 | Low | Not Rated |
| Indian Scout Todd County | 50 | 2010 | High | Satisfactory |
| Indian Dam No.1 Fall River County | 16 | 1932 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.