Montana County Bridge Report Cards
Compare county Bridge Condition Exposure Scores in Montana by condition, traffic exposure, scour-critical bridges, average age, and data completeness. View the scoring methodology.
| County | Grade | Score | Poor | Poor Traffic | Scour-Critical | Avg Age |
|---|---|---|---|---|---|---|
| Wheatland County | F | 37 | 14.8% | 3,530/day | 1 | 58 yrs |
| Petroleum County | F | 40 | 15.4% | 435/day | 2 | 59 yrs |
| Phillips County | F | 45 | 21.8% | 3,712/day | 3 | 52 yrs |
| Daniels County | F | 53 | 12.1% | 401/day | 3 | 41 yrs |
| Lincoln County | F | 54 | 15.2% | 13,036/day | 4 | 49 yrs |
| McCone County | F | 54 | 9.3% | 2,460/day | 3 | 58 yrs |
| Treasure County | F | 55 | 15.4% | 545/day | 1 | 59 yrs |
| Blaine County | F | 56 | 9.8% | 13,031/day | 3 | 57 yrs |
| Meagher County | F | 57 | 13.2% | 550/day | 3 | 45 yrs |
| Granite County | F | 58 | 12.3% | 15,347/day | 3 | 51 yrs |
| Park County | F | 58 | 10.3% | 3,977/day | 15 | 49 yrs |
| Judith Basin County | F | 59 | 15.6% | 406/day | 2 | 47 yrs |
| Roosevelt County | D | 64 | 12.3% | 4,624/day | 1 | 42 yrs |
| Prairie County | D | 65 | 10.9% | 1,439/day | 1 | 64 yrs |
| Madison County | D | 67 | 7.1% | 7,036/day | 6 | 43 yrs |
| Dawson County | D | 68 | 8.3% | 5,160/day | 6 | 53 yrs |
| Lake County | C | 70 | 11.2% | 13,178/day | 2 | 28 yrs |
| Beaverhead County | C | 70 | 10.6% | 8,139/day | 6 | 47 yrs |
| Mineral County | C | 70 | 11.1% | 13,205/day | 2 | 54 yrs |
| Sanders County | C | 71 | 8.3% | 5,522/day | 2 | 46 yrs |
| Ravalli County | C | 72 | 8.0% | 4,468/day | 8 | 43 yrs |
| Broadwater County | C | 72 | 10.8% | 705/day | 1 | 36 yrs |
| Valley County | C | 73 | 10.7% | 1,609/day | 2 | 46 yrs |
| Fergus County | C | 75 | 5.7% | 2,942/day | 9 | 47 yrs |
| Fallon County | C | 76 | 5.3% | 2,241/day | 0 | 28 yrs |
| Custer County | C | 76 | 8.5% | 1,821/day | 1 | 55 yrs |
| Gallatin County | C | 77 | 5.7% | 16,291/day | 11 | 48 yrs |
| Glacier County | C | 77 | 4.2% | 210/day | 5 | 48 yrs |
| Sheridan County | C | 78 | 4.5% | 697/day | 3 | 47 yrs |
| Missoula County | C | 78 | 7.3% | 29,858/day | 5 | 49 yrs |
| Richland County | C | 79 | 4.1% | 5,805/day | 3 | 37 yrs |
| Powell County | B | 80 | 6.2% | 22,075/day | 0 | 45 yrs |
| Cascade County | B | 80 | 5.9% | 9,784/day | 1 | 60 yrs |
| Liberty County | B | 80 | 0.0% | 0/day | 1 | 48 yrs |
| Chouteau County | B | 81 | 4.7% | 1,030/day | 1 | 43 yrs |
| Pondera County | B | 81 | 4.2% | 1,811/day | 3 | 51 yrs |
| Rosebud County | B | 81 | 6.2% | 1,114/day | 2 | 52 yrs |
| Carter County | B | 82 | 4.8% | 865/day | 1 | 41 yrs |
| Lewis and Clark County | B | 82 | 5.4% | 13,274/day | 5 | 46 yrs |
| Sweet Grass County | B | 82 | 6.4% | 3,123/day | 2 | 48 yrs |
| Hill County | B | 82 | 6.5% | 300/day | 1 | 42 yrs |
| Garfield County | B | 83 | 7.7% | 177/day | 0 | 36 yrs |
| Deer Lodge County | B | 83 | 4.5% | 220/day | 2 | 52 yrs |
| Wibaux County | B | 83 | 4.0% | 38/day | 1 | 50 yrs |
| Musselshell County | B | 85 | 3.6% | 100/day | 1 | 40 yrs |
| Golden Valley County | B | 85 | 0.0% | 0/day | 1 | 57 yrs |
| Carbon County | B | 86 | 4.9% | 731/day | 1 | 40 yrs |
| Flathead County | B | 87 | 4.4% | 13,291/day | 2 | 42 yrs |
| Jefferson County | B | 87 | 5.1% | 3,299/day | 1 | 49 yrs |
| Yellowstone County | B | 89 | 2.4% | 26,944/day | 6 | 45 yrs |
| Big Horn County | B | 89 | 3.8% | 794/day | 2 | 47 yrs |
| Teton County | A | 91 | 3.7% | 300/day | 0 | 50 yrs |
| Powder River County | A | 91 | 0.0% | 0/day | 1 | 38 yrs |
| Stillwater County | A | 92 | 1.1% | 5,017/day | 2 | 49 yrs |
| Silver Bow County | A | 93 | 2.9% | 200/day | 0 | 52 yrs |
| Toole County | A | 98 | 0.0% | 0/day | 0 | 53 yrs |