Oso Loop Rd over N.f. Stillaguamish River

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

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

• Oso Loop Rd over N.f. Stillaguamish River in Snohomish 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 1990, making it 35 years old at the 2025 inventory.
• It carries about 357 vehicles a day (traffic count year 2023).
• Its listed owner is the county highway agency.
• It is one of 248 of the 500 inventoried bridges in Snohomish County rated good (49.6%); 20 (4.0%) are rated poor.
• Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
• Its condition class and component ratings are unchanged from the 2024 inventory.
• Its most recent inspection on record is dated June 2024, on a 24-month routine inspection cycle.
• 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.

View this bridge on a map → (48.26599, -121.92866)

Component ratings

Bridge details

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

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