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Delaware St over Fiesta Channel

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

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

Delaware St over Fiesta Channel in San Mateo County, California, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
It was built in 1953 and reconstructed in 1998, making it 72 years old at the 2025 inventory.
It carries about 14,280 vehicles a day (traffic count year 2017).
Its listed owner is a city or municipal highway agency.
It is one of 100 of the 361 inventoried bridges in San Mateo County rated good (27.7%); 37 (10.2%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	7	Good condition


Structure	Continuous concrete culvert
Length	about 32 ft
Location	0.3 Mi S of SH 92
NBI structure number	35C0080
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 San Mateo Creek	1928	236,000	Good
US 101 Rollins Rd over Transmission Canal	1928	232,000	Fair
US 101 Mcdonnell over Millbrae Slough	1947	226,000	Fair
US 101 W&e Bayshr over San Francisquito Creek	2018	225,800	Good
Holly Street over US Highway 101	1954	201,000	Fair
Whipple Avenue over US Highway 101	1958	201,000	Good