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Mcadams Creek Rd over Mcadams Creek

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

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

Mcadams Creek Rd over Mcadams Creek in Siskiyou County, California, 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 1975, making it 50 years old at the 2025 inventory.
It carries about 256 vehicles a day (traffic count year 2011).
Its listed owner is the county highway agency.
It is one of 230 of the 425 inventoried bridges in Siskiyou County rated fair (54.1%); 25 (5.9%) 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	Steel stringer or multi-beam girder
Length	about 40 ft
Location	2.55 Mi N SR 3
NBI structure number	02C0190
Condition class	Fair

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