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State Route 58 over Salinas River

San Luis Obispo County, California · rated Good in the 2025 National Bridge Inventory

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

State Route 58 over Salinas River in San Luis Obispo County, California, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1996, making it 29 years old at the 2025 inventory.
It carries about 1,850 vehicles a day (traffic count year 2009).
Its listed owner is the state highway agency.
It is one of 210 of the 402 inventoried bridges in San Luis Obispo County rated good (52.2%); 22 (5.5%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete multiple box beam
Length	about 323 ft
Location	05-slo-058-4.89
NBI structure number	49 0237
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
U.S. Highway 101 over Stenner Creek	1978	62,000	Good
U.S. Highway 101 over Perfuma Creek	1948	56,000	Good
US Highway 101 NB over Santa Maria River	1962	56,000	Fair
U.S. Highway 101 over Brisco Rd	1956	56,000	Good
U.S. Highway 101 over Whitehorse Draw	1952	54,000	Good
US Highway 101 over St Rte 41 (@PM15.96)	2010	53,000	Good