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I-5 N-w Ramp over SR 432 E-s Ramp

Cowlitz County, Washington · rated Fair in the 2025 National Bridge Inventory

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

I-5 N-w Ramp over SR 432 E-s Ramp in Cowlitz County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1959, making it 66 years old at the 2025 inventory.
It carries about 13,089 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 80 of the 161 inventoried bridges in Cowlitz County rated fair (49.7%); 6 (3.7%) 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


Structure	Continuous concrete multiple box beam
Length	about 183 ft
Location	15.8 N Jct SR 503
NBI structure number	0006025A0000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-5 over Bn Ry	1972	37,599	Fair
I-5 over Kalama River	1971	37,279	Good
I-5 over Kalama River	1970	37,279	Good
I-5 over Owl Creek	1972	36,932	Good
I-5 over Owl Creek	1972	36,932	Good
I-5 over Todd Rd	1971	35,483	Good