Basilone Road over S. Fork San Onofre Creek
San Diego County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Basilone Road over S. Fork San Onofre Creek in San Diego County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1960, making it 65 years old at the 2025 inventory.
- It carries about 4,775 vehicles a day (traffic count year 2004).
- It is one of 724 of the 1,632 inventoried bridges in San Diego County rated fair (44.4%); 39 (2.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
- 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 → (33.37809, -117.48084)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 37 ft |
| Location | 330 SE of Airfield Road |
| NBI structure number | 2CA0007 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in San Diego County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 15 over Mira Mesa Blvd | 1977 | 283,000 | Fair |
| Interstate 805 over Bonita Road | 1975 | 272,000 | Fair |
| Interstate 805 over Telegraph Canyon Road | 1971 | 254,000 | Good |
| Interstate 805 over Telegraph Canyon Drain | 1971 | 250,000 | Poor |
| Interstate 5 over San Elijo Lagoon | 2022 | 247,000 | Good |
| Interstate 5 over Carmel Valley Rd | 1964 | 245,000 | Good |
All bridges nearby: San Diego County, CA bridge conditions · every bridge in San Diego County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.