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SR 6 over Willapa River

Pacific County, Washington · rated Good in the 2025 National Bridge Inventory

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

SR 6 over Willapa River in Pacific County, Washington, 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 1953, making it 72 years old at the 2025 inventory.
It carries about 1,825 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 68 of the 120 inventoried bridges in Pacific County rated good (56.7%); 9 (7.5%) 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 concrete multiple box beam
Length	about 200 ft
Location	9.4 E Jct US 101
NBI structure number	0004552A0000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 101 over Columbia R	1966	23,300	Poor
US 101 over Columbia R	1966	22,526	Fair
US 101 over S Fk Willapa River	1966	10,253	Poor
US 101 over N Fk Willapa	1992	8,151	Fair
US 101 over Skidmore Slough	1980	8,012	Good
US 101 over Chinook R	1927	7,256	Fair