Idaho County Bridge Report Cards
Compare county Bridge Condition Exposure Scores in Idaho 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 |
|---|---|---|---|---|---|---|
| Camas County | F | 55 | 11.3% | 812/day | 8 | 47 yrs |
| Lincoln County | F | 57 | 26.4% | 1,470/day | 0 | 47 yrs |
| Shoshone County | F | 59 | 10.0% | 8,900/day | 23 | 53 yrs |
| Lemhi County | D | 60 | 8.0% | 8,495/day | 5 | 37 yrs |
| Franklin County | D | 60 | 8.7% | 1,310/day | 2 | 51 yrs |
| Boundary County | D | 60 | 13.3% | 1,630/day | 5 | 43 yrs |
| Custer County | D | 62 | 11.1% | 2,420/day | 7 | 47 yrs |
| Teton County | D | 63 | 5.4% | 5,660/day | 5 | 32 yrs |
| Owyhee County | D | 63 | 8.2% | 230/day | 7 | 49 yrs |
| Elmore County | D | 63 | 8.2% | 530/day | 13 | 48 yrs |
| Bonner County | D | 67 | 10.6% | 5,800/day | 5 | 42 yrs |
| Clark County | C | 70 | 12.8% | 2,100/day | 0 | 47 yrs |
| Butte County | C | 70 | 3.1% | 491/day | 3 | 56 yrs |
| Payette County | C | 71 | 4.6% | 6,630/day | 5 | 55 yrs |
| Nez Perce County | C | 72 | 4.2% | 670/day | 7 | 48 yrs |
| Valley County | C | 73 | 6.5% | 5,460/day | 7 | 44 yrs |
| Adams County | C | 73 | 9.2% | 345/day | 3 | 50 yrs |
| Gooding County | C | 74 | 6.2% | 465/day | 4 | 56 yrs |
| Idaho County | C | 75 | 6.9% | 2,359/day | 9 | 49 yrs |
| Boise County | C | 75 | 5.6% | 220/day | 6 | 47 yrs |
| Twin Falls County | C | 76 | 4.0% | 23,090/day | 5 | 53 yrs |
| Gem County | C | 77 | 5.3% | 1,020/day | 3 | 50 yrs |
| Clearwater County | C | 77 | 6.8% | 350/day | 3 | 52 yrs |
| Washington County | C | 77 | 5.0% | 740/day | 5 | 45 yrs |
| Caribou County | C | 77 | 4.4% | 150/day | 3 | 40 yrs |
| Bannock County | B | 80 | 4.7% | 27,300/day | 5 | 42 yrs |
| Bear Lake County | B | 80 | 0.0% | 0/day | 5 | 40 yrs |
| Fremont County | B | 81 | 5.8% | 1,290/day | 5 | 42 yrs |
| Jerome County | B | 81 | 9.0% | 2,470/day | 0 | 50 yrs |
| Bingham County | B | 82 | 3.4% | 50,440/day | 6 | 50 yrs |
| Kootenai County | B | 82 | 4.4% | 36,510/day | 6 | 40 yrs |
| Benewah County | B | 83 | 6.2% | 530/day | 1 | 41 yrs |
| Power County | B | 87 | 1.4% | 1,300/day | 3 | 52 yrs |
| Blaine County | B | 87 | 4.2% | 170/day | 2 | 47 yrs |
| Jefferson County | B | 89 | 3.2% | 641/day | 2 | 52 yrs |
| Canyon County | A | 90 | 2.1% | 30,310/day | 7 | 41 yrs |
| Minidoka County | A | 90 | 1.5% | 1,500/day | 2 | 41 yrs |
| Lewis County | A | 90 | 4.8% | 50/day | 0 | 34 yrs |
| Madison County | A | 90 | 0.0% | 0/day | 4 | 44 yrs |
| Latah County | A | 92 | 0.8% | 6,400/day | 2 | 44 yrs |
| Bonneville County | A | 93 | 1.4% | 47,600/day | 2 | 48 yrs |
| Cassia County | A | 93 | 0.0% | 0/day | 4 | 41 yrs |
| Ada County | A | 94 | 1.0% | 20,400/day | 6 | 36 yrs |
| Oneida County | A | 98 | 0.0% | 0/day | 0 | 54 yrs |