Wilson Ranch Road over California Aqueduct
San Bernardino County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Wilson Ranch Road over California Aqueduct in San Bernardino County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1971, making it 54 years old at the 2025 inventory.
- It carries about 63 vehicles a day (traffic count year 2021).
- It is one of 713 of the 1,422 inventoried bridges in San Bernardino County rated fair (50.1%); 62 (4.4%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (34.4796, -117.52119)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 96 ft |
| Location | 1.9 Mi S of Palmdale Rd |
| NBI structure number | 54C0497 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in San Bernardino 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 |
All bridges nearby: San Bernardino County, CA bridge conditions · every bridge in San Bernardino County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.