Minnesota Dams
1,122 dams tracked by the National Inventory of Dams
Total Dams
1,122
High Hazard
43
3.8%
Poor / Unsatisfactory
80
Average Age
61 yrs
Hazard Classification
High43 (3.8%)
Significant122 (10.9%)
Low930 (82.9%)
Condition Assessment
Satisfactory539 (48.0%)
Fair203 (18.1%)
Poor / Unsatisfactory80 (7.1%)
Not Rated300 (26.7%)
Federal
107
State
269
Local
325
Private
395
Tallest Dams
- Erie Basin 2250 ft
- Erie Basin 1200 ft
- Essar Steel Tailings Basin200 ft
- Poly Met Hrf Dam111 ft
- Canisteo No. 2 North100 ft
High Hazard Dams
Poor Condition Dams
- Rapidan Unsatisfactory
- Tetonka RidgePoor
- Lake BronsonPoor
- Pickwick MillPoor
- Schmidt PondPoor
All Dams in Minnesota
Showing 326–350 of 930
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Otter Tail Lake Otter Tail County | 10 | 1936 | Low | Satisfactory |
| Osterberg Lake Pope County | 11 | 1979 | Low | Fair |
| Orwell-Danube West Tailings Basin Itasca County | 40 | 1954 | Low | Not Rated |
| Orwell-Danube East Tailings Basin Itasca County | 40 | 1954 | Low | Not Rated |
| Ortonville 25 Big Stone County | 22 | — | Low | Fair |
| Ortonville 15 Big Stone County | 27 | — | Low | Fair |
| Olmsted County Rd 10 Olmsted County | 37 | 1978 | Low | Satisfactory |
| Oian Dahl Detention Fillmore County | 26 | 1992 | Low | Satisfactory |
| Ogemash Becker County | 10 | 1966 | Low | Not Rated |
| Ogechie Lake Mille Lacs County | 10 | 1952 | Low | Satisfactory |
| Odney Flaat Wildlife Impoundment Polk County | 13 | 1982 | Low | Fair |
| Nyroca Flats Wma Lyon County | 7 | 2014 | Low | Satisfactory |
| Nycklemoe Otter Tail County | 11 | 2002 | Low | Satisfactory |
| Nspc Initial Tailings St. Louis County | 45 | 1968 | Low | Satisfactory |
| Norway Lake Cass County | 13 | 1909 | Low | Satisfactory |
| North Silver Lake Martin County | 8 | 1972 | Low | Not Rated |
| North Hero 35 Redwood County | 21 | — | Low | Satisfactory |
| North Hero 10 Redwood County | 32 | — | Low | Fair |
| North Eagle Lake Blue Earth County | 7 | 1979 | Low | Not Rated |
| Normandale Lake Hennepin County | 7 | 1980 | Low | Not Rated |
| Norman 7 Yellow Medicine County | 21 | — | Low | Poor |
| Norman 16 Yellow Medicine County | 19 | 1999 | Low | Satisfactory |
| Norland 36 Roseau County | 15 | 2011 | Low | Satisfactory |
| Nordland 8 Lyon County | 16 | 1990 | Low | Satisfactory |
| Nordland 6 Lyon County | 20 | 1992 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.