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Pioneer Hwy over Big Ditch

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

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

Pioneer Hwy over Big Ditch in Skagit 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 1987, making it 38 years old at the 2025 inventory.
It carries about 9,442 vehicles a day (traffic count year 2021).
Its listed owner is the county highway agency.
It is one of 101 of the 256 inventoried bridges in Skagit County rated good (39.5%); 6 (2.3%) 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 slab
Length	about 81 ft
Location	0.23 E Jct Milltown Road
NBI structure number	0013135B0000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-5 over Skagit River	1955	39,245	Fair
I-5 over RR and Cameron Way	1954	37,729	Fair
I-5 over SR 20 BNSF RR & City St	1955	37,394	Good
I-5 over I-5 Drainage	1970	36,919	Good
I-5 over I-5 Drainage	1972	35,558	Fair
I-5 over Hill Ditch	1957	33,686	Fair