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Wb52&nb5-la Jolla over Mtdb BNSF Amtrak I 5 Con

San Diego County, California · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Wb52&nb5-la Jolla over Mtdb BNSF Amtrak I 5 Con in San Diego County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1966, making it 59 years old at the 2025 inventory.
It carries about 18,200 vehicles a day (traffic count year 2019).
Its listed owner is the state highway agency.
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.

Component ratings


Structure	Continuous concrete single box beam
Length	about 1,763 ft
Location	11-sd-052-0.19-sd
NBI structure number	57 0520L
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.

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