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SR 20 over Harney Channel

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

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

SR 20 over Harney Channel in San Juan County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1979 and reconstructed in 1987, making it 46 years old at the 2025 inventory.
It carries about 2,150 vehicles a day (traffic count year 2010).
Its listed owner is the state highway agency.
It is one of 9 of the 13 inventoried bridges in San Juan County rated fair (69.2%); 0 (0.0%) 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

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

Bridge	Built	Vehicles/day	Condition
SR 20 Extension over Friday Hbr-san Juan Chan	1968	2,587	Fair
SR 20 Extension over Friday Hbr-san Juan Chan	2005	2,587	Good
SR 20 over Harney Channel	1959	2,322	Good
Deer Harbor Road over Crow Valley Drainage	2001	1,826	Fair
Orcas to Olga road over Cascade Creek	1921	1,607	Fair
Extension of SR 20 over Upright Channel	1981	1,349	Fair