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 1501–1525 of 2,541
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Nelson Dam Haakon County | 30 | 1976 | Low | Not Rated |
| Nelson Dam No.1 Harding County | 25 | 1974 | Low | Not Rated |
| Nelson Dam No. 2 Fall River County | 23 | 1999 | Low | Not Rated |
| Nestor Kivimaki Dam No.1 Butte County | 13 | 1921 | Low | Not Rated |
| Neuharth Dam #1 Stanley County | 13 | 1993 | Low | Not Rated |
| Neuharth Dam #2 Stanley County | 15 | 1993 | Low | Not Rated |
| Newell Butte County | 38 | 1958 | Low | Not Rated |
| New Stickney (Nelson) Aurora County | 18 | 1965 | Low | Not Rated |
| New Underwood Pennington County | 22 | 1946 | Low | Not Rated |
| New Underwood Land Partners Dam Pennington County | 14 | 1986 | Low | Not Rated |
| New Wall Lake Pennington County | 40 | 1947 | Low | Not Rated |
| Nichols Number 1 Jones County | 25 | 1959 | Low | Not Rated |
| Nichols Number 2 Jones County | 27 | 1958 | Low | Not Rated |
| Niedan Number 1 Jones County | 20 | 1959 | Low | Not Rated |
| Nielsen Number 1 Jones County | 26 | 1961 | Low | Not Rated |
| Niemi No.1 Harding County | 25 | 1960 | Low | Not Rated |
| Niemi No.2 Harding County | 22 | 1957 | Low | Not Rated |
| Niemi No.3 Harding County | 25 | 1938 | Low | Not Rated |
| Niemi No.4 Harding County | 19 | 1954 | Significant | Not Rated |
| Niemi No.5 Harding County | 14 | 1957 | Low | Not Rated |
| Nix Number 1 Jones County | 30 | 1960 | Low | Not Rated |
| Nix Number 2 Jones County | 27 | 1960 | Low | Not Rated |
| Nix Number 3 Jones County | 28 | 1960 | Low | Not Rated |
| Nix Number 4 Jones County | 27 | 1960 | Low | Not Rated |
| Nohrenberg #3 Mellette County | 33 | 1957 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.