Bridge conditions in Placer County, California
349 inventoried bridges · 16 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 349 bridges in Placer County: 152 rated good, 181 fair, and 16 poor.
- 16 of the 349 bridges in Placer County, California, are rated in poor condition (4.6%) in the 2025 National Bridge Inventory, as of .
- 152 bridges (43.6%) are rated good and 181 (51.9%) fair.
- The median Placer County bridge was built in 1973.
- The busiest poor-rated bridge is Interstate 80 over UP RR BNSF Ry & Amtrak (built 1961), carrying about 29,000 vehicles a day.
Good 43.6% · Fair 51.9% · Poor 4.6% of 349 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.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 80 over UP RR BNSF Ry & Amtrak | 1961 | 29,000 | Poor |
| Interstate 80 over Carpenter Road | 1958 | 29,000 | Poor |
| Interstate 80 EB over Hampshire Rocks S Yuba R | 1963 | 27,000 | Poor |
| Interstate 80 EB over Troy Road | 1959 | 13,500 | Poor |
| Interstate 80 EB over Kingvale Road | 1959 | 13,500 | Poor |
| Interstate 80 EB over Blue Canyon Road | 1959 | 13,500 | Poor |
| Interstate 80 WB over Blue Canyon Road | 1959 | 13,250 | Poor |
| State Route 89 over Truckee River | 1928 | 11,100 | Poor |
| Auburn-forsthillrd over N Fk American River | 1973 | 7,318 | Poor |
| Brace Road over Secret Ravine | 1939 | 2,595 | Poor |
| Squaw Valley Road over Squaw Creek | 1959 | 2,497 | Poor |
| Old Aub Fsthill Rd over North Fork American Riv | 1955 | 537 | Poor |
| Cisco Rd over South Yuba River | 1963 | 250 | Poor |
| Garden Bar Rd over Coon Creek | 1945 | 209 | Poor |
| Fdr 44 over Deep Creek | 1954 | 50 | Poor |
| Fdr 19 over N. Fk. of N. Fk Amer Riv | 1949 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 80 over Linda Creek | 1955 | 165,000 | Good |
| Interstate 80 over Miners Ravine | 1954 | 155,000 | Good |
| Interstate 80 over Rocklin Road | 1959 | 92,000 | Fair |
| Interstate 80 over Penryn Rock Springs Road | 1959 | 80,000 | Good |
| Interstate 80 over Werner Road | 1957 | 77,000 | Good |
| Interstate 80 over State Route 193 | 1959 | 77,000 | Fair |
| State Route 65 over Little Pleasant Grove CR | 1971 | 70,000 | Good |
| Interstate 80 over UP RR BNSF Ry & Amtrak | 1989 | 59,000 | Fair |
| Interstate 80 over SR 49 (golden Chain Hwy) | 1989 | 59,000 | Fair |
| Interstate 80 over Walsh St | 1946 | 59,000 | Fair |
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.