Bridge conditions in Ventura County, California
501 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Ventura County tracks close to typical: 12 of its 501 inventoried bridges (2.4%) are rated poor, against a national rate of about 7%.
- 12 of the 501 bridges in Ventura County, California, are rated in poor condition (2.4%) in the 2025 National Bridge Inventory, as of .
- 288 bridges (57.5%) are rated good and 201 (40.1%) fair.
- The median Ventura County bridge was built in 1969.
- The busiest poor-rated bridge is Madera Road over UP RR Amtrak Metrolink (built 1981), carrying about 33,000 vehicles a day.
Good 57.5% · Fair 40.1% · Poor 2.4% of 501 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 |
|---|---|---|---|
| Madera Road over UP RR Amtrak Metrolink | 1981 | 33,000 | Poor |
| State Route 126 over Pole Creek | 1981 | 30,000 | Poor |
| Madera Road over Arroyo Simi | 1979 | 30,000 | Poor |
| State Route 126 over Ellsworth Barranca | 1965 | 25,000 | Poor |
| 1ST Street over Arroyo Simi | 1971 | 22,500 | Poor |
| State Route 33 over San Antonio Creek | 1936 | 20,500 | Poor |
| Telephone Rd over UP RR & Amtrak | 1981 | 13,495 | Poor |
| SR 1 over Big Sycamore Creek | 1938 | 11,600 | Poor |
| Tierra Rejada Rd. over Arroyo Simi | 1990 | 8,640 | Poor |
| Main St over Ventura River | 1932 | 6,853 | Poor |
| Laguna Road over Mugu Lagoon | 1949 | 200 | Poor |
| Las Posas Road over District #2 Canal | 1948 | 200 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. Highway 101 over Hampshire Rd | 1966 | 193,000 | Fair |
| U.S. Highway 101 over Conejo School Rd | 1966 | 193,000 | Fair |
| U.S. Highway 101 over Rancho Rd | 1970 | 193,000 | Good |
| U.S. Highway 101 over S101-n23 Connector Ramp | 1970 | 193,000 | Good |
| U.S. Highway 101 over Moorpark Rd | 1962 | 192,000 | Fair |
| U.S. Highway 101 over Hillside | 1982 | 192,000 | Good |
| U.S. Highway 101 over Hillside | 1982 | 192,000 | Good |
| U.S. Highway 101 over Hillside | 1982 | 192,000 | Good |
| U.S. Highway 101 over S Branch Arroyo Conejo | 1954 | 180,000 | Good |
| U.S. Highway 101 over Cord Ave Culvert | 1973 | 176,000 | 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.