California County Bridge Report Cards
Compare county Bridge Condition Exposure Scores in California 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 |
|---|---|---|---|---|---|---|
| Santa Cruz County | F | 38 | 16.5% | 185,125/day | 18 | 62 yrs |
| Stanislaus County | F | 44 | 13.5% | 640,852/day | 16 | 69 yrs |
| Amador County | F | 46 | 24.6% | 28,160/day | 0 | 59 yrs |
| Mariposa County | F | 48 | 11.0% | 14,296/day | 8 | 69 yrs |
| San Francisco County | F | 56 | 13.9% | 1,382,683/day | 0 | 56 yrs |
| Lake County | F | 57 | 9.2% | 7,878/day | 13 | 55 yrs |
| Sutter County | F | 58 | 13.2% | 13,387/day | 6 | 58 yrs |
| Glenn County | F | 59 | 7.1% | 11,713/day | 19 | 71 yrs |
| San Mateo County | D | 64 | 10.2% | 1,454,025/day | 5 | 59 yrs |
| Del Norte County | D | 64 | 9.3% | 205/day | 8 | 50 yrs |
| San Joaquin County | D | 66 | 9.6% | 1,288,788/day | 10 | 57 yrs |
| Marin County | D | 66 | 7.7% | 179,256/day | 8 | 67 yrs |
| Nevada County | D | 67 | 13.9% | 61,976/day | 0 | 52 yrs |
| Butte County | D | 67 | 5.5% | 62,739/day | 28 | 67 yrs |
| Tuolumne County | D | 68 | 6.4% | 47,980/day | 3 | 62 yrs |
| San Benito County | D | 68 | 9.2% | 40,360/day | 2 | 55 yrs |
| Yuba County | D | 68 | 7.1% | 21,610/day | 7 | 58 yrs |
| Plumas County | D | 69 | 3.0% | 10,246/day | 11 | 60 yrs |
| Napa County | C | 70 | 5.0% | 103,912/day | 6 | 64 yrs |
| Mendocino County | C | 70 | 7.6% | 38,739/day | 17 | 56 yrs |
| Tehama County | C | 70 | 4.7% | 35,746/day | 27 | 65 yrs |
| Contra Costa County | C | 71 | 9.0% | 2,531,668/day | 3 | 48 yrs |
| Calaveras County | C | 71 | 5.6% | 3,735/day | 6 | 61 yrs |
| Solano County | C | 72 | 6.4% | 1,075,345/day | 5 | 50 yrs |
| Madera County | C | 72 | 9.6% | 49,885/day | 5 | 51 yrs |
| Sonoma County | C | 74 | 5.2% | 252,564/day | 25 | 58 yrs |
| Lassen County | C | 75 | 7.4% | 2,382/day | 3 | 58 yrs |
| Humboldt County | C | 76 | 5.3% | 34,427/day | 16 | 58 yrs |
| San Luis Obispo County | C | 77 | 5.5% | 201,471/day | 10 | 55 yrs |
| Imperial County | C | 77 | 7.9% | 100,835/day | 0 | 58 yrs |
| Colusa County | C | 77 | 5.6% | 6,503/day | 8 | 58 yrs |
| Siskiyou County | C | 78 | 5.9% | 20,945/day | 12 | 54 yrs |
| Yolo County | C | 79 | 4.4% | 135,249/day | 5 | 59 yrs |
| Alameda County | B | 80 | 6.3% | 1,986,214/day | 6 | 52 yrs |
| Merced County | B | 80 | 4.3% | 108,660/day | 12 | 58 yrs |
| Fresno County | B | 80 | 3.8% | 289,486/day | 35 | 55 yrs |
| Tulare County | B | 80 | 3.0% | 72,700/day | 15 | 66 yrs |
| Monterey County | B | 80 | 7.1% | 73,587/day | 1 | 56 yrs |
| Sierra County | B | 81 | 6.1% | 2,540/day | 0 | 52 yrs |
| Alpine County | B | 81 | 6.1% | 815/day | 0 | 61 yrs |
| Riverside County | B | 81 | 1.6% | 238,324/day | 85 | 49 yrs |
| Kern County | B | 82 | 5.5% | 436,310/day | 4 | 53 yrs |
| El Dorado County | B | 82 | 5.7% | 58,193/day | 2 | 51 yrs |
| San Bernardino County | B | 82 | 4.4% | 402,517/day | 53 | 51 yrs |
| Trinity County | B | 82 | 3.6% | 1,080/day | 9 | 49 yrs |
| Kings County | B | 83 | 3.6% | 32,590/day | 2 | 57 yrs |
| Santa Barbara County | B | 83 | 3.8% | 243,255/day | 11 | 49 yrs |
| Placer County | B | 84 | 4.6% | 163,356/day | 6 | 49 yrs |
| Mono County | B | 84 | 5.4% | 152/day | 1 | 53 yrs |
| Santa Clara County | B | 85 | 4.5% | 998,667/day | 10 | 53 yrs |
| Shasta County | B | 85 | 2.2% | 44,249/day | 13 | 59 yrs |
| Ventura County | B | 88 | 2.4% | 201,988/day | 6 | 56 yrs |
| Los Angeles County | B | 89 | 2.6% | 3,689,010/day | 7 | 59 yrs |
| Inyo County | A | 90 | 2.9% | 100/day | 1 | 52 yrs |
| Modoc County | A | 91 | 1.1% | 1,200/day | 1 | 56 yrs |
| Sacramento County | A | 92 | 2.2% | 220,488/day | 5 | 53 yrs |
| San Diego County | A | 93 | 2.4% | 1,475,730/day | 3 | 48 yrs |
| Orange County | A | 93 | 2.8% | 1,147,213/day | 1 | 46 yrs |