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State Route 20 over 7TH St Cnfr E Side Cnl

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

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

State Route 20 over 7TH St Cnfr E Side Cnl in Colusa County, California, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1971, making it 54 years old at the 2025 inventory.
It carries about 5,800 vehicles a day (traffic count year 2012).
Its listed owner is the state highway agency.
It is one of 101 of the 213 inventoried bridges in Colusa County rated good (47.4%); 12 (5.6%) 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


Structure	Continuous prestressed concrete multiple box beam
Length	about 342 ft
Location	03-col-020-r21.85
NBI structure number	15 0024
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Interstate 5 over Hillgate Road	1957	35,000	Good
Interstate 5 over Brush Creek	1967	35,000	Good
Interstate 5 over Cortina Creek Overflow	1946	33,000	Good
Interstate 5 over Farm Land Drain	1968	30,000	Fair
Interstate 5 over South Branch Sand Creek	1967	29,500	Good
Interstate 5 over Petroleum Creek	1967	18,000	Fair