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Salmon River Road over Salmon River

Siskiyou County, California · rated Poor in the 2025 National Bridge Inventory

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

Salmon River Road over Salmon River in Siskiyou County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1966, making it 59 years old at the 2025 inventory.
It carries about 210 vehicles a day (traffic count year 2011).
Its listed owner is the county highway agency.
It is one of 25 of the 425 inventoried bridges in Siskiyou County rated poor (5.9%); 25 (5.9%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 406 ft
Location	13.2 Mi W/o Sawyers Bar R
NBI structure number	02C0016
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Interstate 5 SB over UP RR & Amtrak	1964	20,000	Fair
Interstate 5 NB over UP RR & Amtrak	1964	20,000	Fair
Interstate 5 over Mott Road	1976	20,000	Good
Interstate 5 over Mott Road	1976	20,000	Fair
Interstate 5 over Dunsmuir Ave	1976	19,200	Good
Interstate 5 over Sacramento UP RR Amtrak	1955	18,000	Good