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Mountain Loop Hwy. over Coal Creek

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

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

Mountain Loop Hwy. over Coal Creek in Snohomish 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 5 (fair condition) on the 0-9 scale.
It was built in 1949, making it 76 years old at the 2025 inventory.
It carries about 1,324 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 232 of the 500 inventoried bridges in Snohomish County rated fair (46.4%); 20 (4.0%) 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	Timber stringer or multi-beam girder
Length	about 70 ft
Location	24.0 E Jct SR 92
NBI structure number	082284000000000
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 212TH St SW	1963	98,485	Fair
I-5 over 212TH St SW	1963	98,485	Fair
I-5 over 52ND Ave W	1963	98,485	Good
I-5 over 52ND Ave W	1963	98,485	Fair
I-5 over Lowell Road	1950	94,939	Good
I-5 over Lowell Road	1967	94,939	Good