Bridge conditions in San Bernardino County, California
1,422 inventoried bridges · 62 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 1,422 bridges in San Bernardino County: 647 rated good, 713 fair, and 62 poor.
- 62 of the 1,422 bridges in San Bernardino County, California, are rated in poor condition (4.4%) in the 2025 National Bridge Inventory, as of .
- 647 bridges (45.5%) are rated good and 713 (50.1%) fair.
- The median San Bernardino County bridge was built in 1971.
- The busiest poor-rated bridge is Central Ave over UP RR Amtrak Metrolink (built 1967), carrying about 39,900 vehicles a day.
Good 45.5% · Fair 50.1% · Poor 4.4% of 1,422 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 60 over St Rte 83 (euclid Ave) | 1970 | 228,000 | Fair |
| Interstate 10 over Day Canyon Channel | 1943 | 226,300 | Good |
| State Route 60 over San Antonio Ave | 1970 | 224,000 | Fair |
| State Route 60 over Campus Avenue | 1972 | 221,000 | Good |
| State Route 60 over Grove Avenue | 1972 | 221,000 | Good |
| State Route 60 over Vineyard Avenue | 1972 | 221,000 | Good |
| State Route 60 over Cucamonga Creek | 1972 | 221,000 | Fair |
| State Route 60 over Mountain Avenue | 1970 | 220,000 | Fair |
| Interstate 10 over Benson Avenue | 1953 | 219,000 | Good |
| Interstate 10 over San Antonio Wash | 1953 | 219,000 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of California: California bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.