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Mount Helix Dr over Mount Helix Dr

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

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

Mount Helix Dr over Mount Helix Dr 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 superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1934, making it 91 years old at the 2025 inventory.
It carries about 859 vehicles a day (traffic count year 2016).
Its listed owner is the county 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	Steel stringer or multi-beam girder
Length	about 37 ft
Location	0.36MI S/o Fuerte Drive
NBI structure number	57C0376
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