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13TH St over Wildcat Creek

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

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

13TH St over Wildcat Creek in Contra Costa 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 1994, making it 31 years old at the 2025 inventory.
It carries about 25,106 vehicles a day (traffic count year 2010).
Its listed owner is a city or municipal highway agency.
It is one of 260 of the 622 inventoried bridges in Contra Costa County rated good (41.8%); 56 (9.0%) 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 34 ft
Location	0.1 Mi S of Brookside Dr.
NBI structure number	28C0324
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Interstate 680 over Canal & Bike Path	1956	257,000	Fair
Interstate 680 over Monument Boulevard	1998	235,000	Poor
Interstate 680 over Parkside Drive	1960	235,000	Good
Interstate 680 over Rudgear Road	1964	197,400	Good
Interstate 680 over Livorna Road	1964	197,400	Good
Interstate 680 over Newell Avenue	1994	195,300	Fair