Old Hwy 101 over Nctd BNSF Ry Amtrak
San Diego County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Old Hwy 101 over Nctd BNSF Ry Amtrak in San Diego 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 1937 and reconstructed in 1962, making it 88 years old at the 2025 inventory.
- It carries about 8,600 vehicles a day (traffic count year 2016).
- 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.
- 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 → (33.37556, -117.56336)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 7 | Good condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete tee beam |
| Length | about 240 ft |
| Location | San Onofre State Park |
| NBI structure number | 57P0008 |
| Condition class | Fair |
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.