Water Supply Dams in Montana
Montana has 39 water supply dams, of which 10 carry a high hazard classification. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area.
| # | Dam | County | Height (ft) | Hazard | Condition | Year |
|---|---|---|---|---|---|---|
| 1 | Basin Creek Dam #1 | Silver Bow | 101 | High | Satisfactory | 1897 |
| 2 | Cedar Creek | Flathead | 93 | High | Satisfactory | 1971 |
| 3 | Moulton Creek Dam #1 | Silver Bow | 67 | High | Satisfactory | 1907 |
| 4 | Flower Creek Dam | Lincoln | 59 | High | Satisfactory | 2016 |
| 5 | Chessman Main Dam | Lewis and Clark | 57 | High | Fair | 1908 |
| 6 | No. Decker Flood Control Reservoir No. 2 | Big Horn | 52 | Significant | Fair | |
| 7 | Basin Creek Dam #2 | Silver Bow | 49 | Significant | Poor | 1907 |
| 8 | Northern Pacific Reservoir Dam | Jefferson | 35 | High | Not Rated | 1935 |
| 9 | Deadmans Basin Water Supply Canal Storage Reservoir #2 | Wheatland | 33 | Low | ||
| 10 | Scott Reservoir | Lewis and Clark | 32 | High | Fair | 1952 |
| 11 | Big Lake | Missoula | 30 | Significant | 1915 | |
| 12 | Rock Creek Lake | Powell | 30 | Significant | 1960 | |
| 13 | Loubren Incorporated #1 | Toole | 30 | Low | 1940 | |
| 14 | Deadmans Basin Water Supply Canal Storage Reservoir #5 | Wheatland | 30 | Significant | ||
| 15 | Jessup Mill Pond Dam | Flathead | 28 | High | Satisfactory | 1941 |
| 16 | Deadmans Basin Water Supply Canal Storage Reservoir #6 | Wheatland | 28 | Low | ||
| 17 | Chessman Saddle Dam | Jefferson | 27 | High | Satisfactory | 1908 |
| 18 | Lester Peters #1 | Toole | 27 | Low | 1958 | |
| 19 | Meyer's Dam | Deer Lodge | 25 | Low | 1902 | |
| 20 | Little Lake | Missoula | 25 | Significant | 1912 | |
| 21 | Deep Coulee | Petroleum | 25 | Low | 1971 | |
| 22 | 26n9e22 | Chouteau | 22 | Low | ||
| 23 | Fred Burr Lake (granite) | Granite | 21 | High | Satisfactory | 1930 |
| 24 | Muddy Spots | Cascade | 20 | Low | 1938 | |
| 25 | Wilson #1 (toole) | Toole | 20 | Low | 1935 | |
| 26 | Br-57 | Blaine | 18 | Low | 1942 | |
| 27 | North Fork Red Lodge Reservoir | Carbon | 18 | Low | 1920 | |
| 28 | Gollaher #2 | Cascade | 18 | Low | 1930 | |
| 29 | Spun | Cascade | 15 | Significant | 1960 | |
| 30 | Otilalda | Pondera | 15 | Low | 1960 | |
| 31 | G N R R Dunkirk Reservoir | Toole | 14 | Significant | 1889 | |
| 32 | Glacier Lake Dam | Missoula | 12 | Significant | 1915 | |
| 33 | Sanders Lake Dam #1 North | Missoula | 10 | Significant | 1913 | |
| 34 | Townsend Sewage Lagoon | Broadwater | 9 | Low | 1962 | |
| 35 | Hearst Lake | Deer Lodge | 9 | Low | 1898 | |
| 36 | R Downs #10 | Big Horn | 8 | Low | 1950 | |
| 37 | Harlem Water Supply | Blaine | 8 | Low | 1960 | |
| 38 | Maddox Ranch Corporation #1 | Blaine | 7 | Low | 1960 | |
| 39 | Mckinley Lake | Missoula | 7 | Significant | 1923 |