Checked
California Bridge Conditions
Highway bridges longer than 20 feet in the 2025 National Bridge Inventory
Yearly inspection ratings. A poor rating does not mean a bridge is unsafe to use.
- Highway bridges
- 25,975
- Good condition
- 47.1%
- 12,239
- Poor condition
- 4.9%
- 1,284
- Weight-limited or closed
- 487
Bridges by county
| County | Bridges | Good | Poor | Weight-limited | Avg. year built |
|---|---|---|---|---|---|
| Alameda County | 662 | 39.9% | 6.3% (42) | 0 | 1974 |
| Alpine County | 33 | 30.3% | 6.1% (2) | 0 | 1965 |
| Amador County | 61 | 34.4% | 24.6% (15) | 3 | 1966 |
| Butte County | 440 | 31.4% | 5.5% (24) | 18 | 1958 |
| Calaveras County | 108 | 36.1% | 5.6% (6) | 5 | 1965 |
| Colusa County | 213 | 47.4% | 5.6% (12) | 3 | 1968 |
| Contra Costa County | 622 | 41.8% | 9% (56) | 3 | 1977 |
| Del Norte County | 97 | 47.4% | 9.3% (9) | 6 | 1976 |
| El Dorado County | 192 | 50.5% | 5.7% (11) | 10 | 1975 |
| Fresno County | 921 | 39.4% | 3.8% (35) | 18 | 1970 |
| Glenn County | 240 | 37.9% | 7.1% (17) | 9 | 1954 |
| Humboldt County | 399 | 42.4% | 5.3% (21) | 6 | 1968 |
| Imperial County | 445 | 54.6% | 7.9% (35) | 22 | 1968 |
| Inyo County | 69 | 66.7% | 2.9% (2) | 0 | 1974 |
| Kern County | 668 | 49.7% | 5.5% (37) | 0 | 1972 |
| Kings County | 169 | 43.8% | 3.6% (6) | 1 | 1968 |
| Lake County | 131 | 30.5% | 9.2% (12) | 5 | 1970 |
| Lassen County | 108 | 25.9% | 7.4% (8) | 9 | 1968 |
| Los Angeles County | 3,549 | 62.1% | 2.6% (94) | 17 | 1967 |
| Madera County | 250 | 38% | 9.6% (24) | 10 | 1974 |
| Marin County | 207 | 44% | 7.7% (16) | 5 | 1958 |
| Mariposa County | 109 | 18.3% | 11% (12) | 5 | 1956 |
| Mendocino County | 356 | 34.8% | 7.6% (27) | 13 | 1969 |
| Merced County | 532 | 36.7% | 4.3% (23) | 6 | 1968 |
| Modoc County | 87 | 49.4% | 1.1% (1) | 4 | 1969 |
| Mono County | 56 | 62.5% | 5.4% (3) | 1 | 1973 |
| Monterey County | 378 | 56.9% | 7.1% (27) | 19 | 1970 |
| Napa County | 160 | 44.4% | 5% (8) | 5 | 1962 |
| Nevada County | 137 | 46% | 13.9% (19) | 10 | 1973 |
| Orange County | 1,181 | 56.6% | 2.8% (33) | 0 | 1979 |
| Placer County | 349 | 43.6% | 4.6% (16) | 8 | 1976 |
| Plumas County | 165 | 26.1% | 3% (5) | 7 | 1965 |
| Riverside County | 1,120 | 57.1% | 1.6% (18) | 4 | 1977 |
| Sacramento County | 737 | 53.2% | 2.2% (16) | 6 | 1973 |
| San Benito County | 76 | 46.1% | 9.2% (7) | 1 | 1971 |
| San Bernardino County | 1,422 | 45.5% | 4.4% (62) | 42 | 1975 |
| San Diego County | 1,632 | 53.2% | 2.4% (39) | 4 | 1977 |
| San Francisco County | 144 | 33.3% | 13.9% (20) | 0 | 1969 |
| San Joaquin County | 655 | 33.6% | 9.6% (63) | 2 | 1968 |
| San Luis Obispo County | 402 | 52.2% | 5.5% (22) | 4 | 1970 |
| San Mateo County | 361 | 27.7% | 10.2% (37) | 1 | 1967 |
| Santa Barbara County | 421 | 53.7% | 3.8% (16) | 0 | 1976 |
| Santa Clara County | 966 | 42.1% | 4.5% (43) | 10 | 1973 |
| Santa Cruz County | 194 | 40.7% | 16.5% (32) | 4 | 1964 |
| Shasta County | 493 | 50.5% | 2.2% (11) | 10 | 1967 |
| Sierra County | 66 | 43.9% | 6.1% (4) | 1 | 1974 |
| Siskiyou County | 425 | 40% | 5.9% (25) | 14 | 1971 |
| Solano County | 374 | 51.9% | 6.4% (24) | 1 | 1976 |
| Sonoma County | 611 | 22.6% | 5.2% (32) | 11 | 1968 |
| Stanislaus County | 386 | 31.1% | 13.5% (52) | 8 | 1956 |
| Sutter County | 121 | 33.9% | 13.2% (16) | 1 | 1968 |
| Tehama County | 447 | 37.4% | 4.7% (21) | 24 | 1961 |
| Trinity County | 194 | 57.7% | 3.6% (7) | 4 | 1977 |
| Tulare County | 607 | 42.7% | 3% (18) | 2 | 1960 |
| Tuolumne County | 125 | 36% | 6.4% (8) | 3 | 1964 |
| Ventura County | 501 | 57.5% | 2.4% (12) | 1 | 1969 |
| Yolo County | 274 | 44.2% | 4.4% (12) | 0 | 1966 |
| Yuba County | 127 | 40.9% | 7.1% (9) | 10 | 1968 |
Frequently asked questions
- How many bridges in California are in poor condition?
- In the 2025 National Bridge Inventory, 1,284 of 25,975 highway bridges in California were rated poor (4.9% of rated bridges).
- Which California counties have the most bridges in poor condition?
- Among counties with at least 30 bridges, the highest shares rated poor are Amador County (24.6%), Santa Cruz County (16.5%), Nevada County (13.9%), San Francisco County (13.9%), Stanislaus County (13.5%).
Source: Federal Highway Administration, National Bridge Inventory · 2025 data