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Arroyo Vista over Arroyo Seco

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

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

Arroyo Vista over Arroyo Seco in Alameda 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 1985, making it 40 years old at the 2025 inventory.
It carries about 1,000 vehicles a day (traffic count year 1990).
Its listed owner is a city or municipal highway agency.
It is one of 356 of the 662 inventoried bridges in Alameda County rated fair (53.8%); 42 (6.3%) 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 60 ft
Location	500 W Las Positas Rd
NBI structure number	33C0383
Condition class	Fair

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