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Interstate 580 over Arroyo Seco

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

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

Interstate 580 over Arroyo Seco in Alameda 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 1954 and reconstructed in 2015, making it 71 years old at the 2025 inventory.
It carries about 197,000 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 264 of the 662 inventoried bridges in Alameda County rated good (39.9%); 42 (6.3%) 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 46 ft
Location	04-ala-580-11.04-lvmr
NBI structure number	33 0066
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Interstate 80 over Gilman Street	1955	550,000	Good
Interstate 80 over Powell Street	1954	531,000	Good
Interstate 80 over Buried Walkway	1954	531,000	Fair
Interstate 80 over Temescal Creek	1936	288,000	Good
Interstate 580 over Maple Ave	1963	274,000	Fair
Interstate 80 WB over UP BNSF Amtrak E80-w580	1960	271,000	Good