Dams in Montana
2,984
Total Dams
187
High Hazard
6.27%
% High Hazard
74.1 yrs
Average Age
Counties
| County | Dams | High Hazard | % High | Avg Age |
|---|---|---|---|---|
| Madison | 29 | 11 | 37.93% | 71.9 yrs |
| Lewis and Clark | 30 | 11 | 36.67% | 81.3 yrs |
| Ravalli | 21 | 9 | 42.86% | 106.3 yrs |
| Lake | 17 | 9 | 52.94% | 84.7 yrs |
| Meagher | 49 | 8 | 16.33% | 81.1 yrs |
| Wheatland | 35 | 8 | 22.86% | 68.3 yrs |
| Flathead | 12 | 8 | 66.67% | 79.9 yrs |
| Powell | 38 | 8 | 21.05% | 70.6 yrs |
| Beaverhead | 43 | 7 | 16.28% | 71.8 yrs |
| Hill | 104 | 7 | 6.73% | 80.6 yrs |
| Jefferson | 11 | 7 | 63.64% | 95.1 yrs |
| Teton | 38 | 6 | 15.79% | 77.9 yrs |
| Lincoln | 19 | 6 | 31.58% | 66.3 yrs |
| Missoula | 22 | 5 | 22.73% | 82.2 yrs |
| Cascade | 43 | 5 | 11.63% | 78.7 yrs |
| Petroleum | 55 | 5 | 9.09% | 67.4 yrs |
| Gallatin | 9 | 4 | 44.44% | 60.3 yrs |
| Rosebud | 270 | 4 | 1.48% | 71.7 yrs |
| Big Horn | 72 | 4 | 5.56% | 68.3 yrs |
| Pondera | 44 | 4 | 9.09% | 83.1 yrs |
| Sweet Grass | 18 | 4 | 22.22% | 76.4 yrs |
| Fergus | 109 | 4 | 3.67% | 71.1 yrs |
| Carbon | 15 | 4 | 26.67% | 77.4 yrs |
| Silver Bow | 10 | 3 | 30.00% | 85.5 yrs |
| Park | 23 | 3 | 13.04% | 70.7 yrs |
| Sanders | 8 | 3 | 37.50% | 75.0 yrs |
| Stillwater | 10 | 3 | 30.00% | 74.5 yrs |
| Deer Lodge | 11 | 3 | 27.27% | 109.4 yrs |
| Glacier | 17 | 3 | 17.65% | 84.0 yrs |
| Blaine | 120 | 2 | 1.67% | 79.3 yrs |
| Granite | 11 | 2 | 18.18% | 74.4 yrs |
| Phillips | 174 | 2 | 1.15% | 76.6 yrs |
| Fallon | 36 | 2 | 5.56% | 71.3 yrs |
| Toole | 87 | 2 | 2.30% | 82.9 yrs |
| Judith Basin | 20 | 2 | 10.00% | 70.0 yrs |
| Broadwater | 5 | 1 | 20.00% | 79.0 yrs |
| Sheridan | 24 | 1 | 4.17% | 76.8 yrs |
| Richland | 78 | 1 | 1.28% | 71.6 yrs |
| McCone | 120 | 1 | 0.83% | 73.9 yrs |
| Dawson | 64 | 1 | 1.56% | 75.6 yrs |
| Musselshell | 30 | 1 | 3.33% | 68.2 yrs |
| Chouteau | 103 | 1 | 0.97% | 75.9 yrs |
| Liberty | 37 | 1 | 2.70% | 72.8 yrs |
| Yellowstone | 25 | 1 | 4.00% | 69.5 yrs |
| Roosevelt | 39 | 0 | 0.00% | 77.0 yrs |
| Powder River | 47 | 0 | 0.00% | 72.4 yrs |
| Golden Valley | 8 | 0 | 0.00% | 70.1 yrs |
| Treasure | 16 | 0 | 0.00% | 71.1 yrs |
| Prairie | 49 | 0 | 0.00% | 68.4 yrs |
| Custer | 176 | 0 | 0.00% | 70.4 yrs |
| Valley | 144 | 0 | 0.00% | 68.1 yrs |
| Carter | 111 | 0 | 0.00% | 72.9 yrs |
| Wibaux | 13 | 0 | 0.00% | 71.7 yrs |
| Daniels | 20 | 0 | 0.00% | 68.2 yrs |
| Garfield | 244 | 0 | 0.00% | 71.3 yrs |
Purpose Breakdown
Tallest Dams in Montana
| Dam Name | Height | County | Hazard |
|---|---|---|---|
| Yankee Doodle Tailings Dam | 570 ft | Silver Bow | High Hazard |
| Hungry Horse | 564 ft | Flathead | High Hazard |
| Yellowtail | 491 ft | Big Horn | High Hazard |
| Canyon Ferry | 225 ft | Lewis and Clark | High Hazard |
| Tiber | 206 ft | Liberty | High Hazard |
| Swift (Pondera) | 205 ft | Pondera | High Hazard |
| Selis Ksanka Qlispe (Skq) | 200 ft | Lake | High Hazard |
| Gibson | 199 ft | Teton | High Hazard |
| Tailings Impoundment | 155 ft | Madison | Significant Hazard |
| Clark Canyon | 148 ft | Beaverhead | High Hazard |