Home › California › San Luis Obispo County › Foothill Road over Laguna Creek

Foothill Road over Laguna Creek

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

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

Foothill Road over Laguna Creek in San Luis Obispo County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1959, making it 66 years old at the 2025 inventory.
It carries about 8,654 vehicles a day (traffic count year 2014).
Its listed owner is the county highway agency.
It is one of 170 of the 402 inventoried bridges in San Luis Obispo County rated fair (42.3%); 22 (5.5%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition


Structure	Continuous concrete culvert
Length	about 35 ft
Location	0.3 Mi N Los Osos Valy Rd
NBI structure number	49C0222
Condition class	Fair

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