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US 20 over Johnson Creek

Camas County, Idaho · rated Fair in the 2025 National Bridge Inventory

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

US 20 over Johnson Creek in Camas County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1958, making it 67 years old at the 2025 inventory.
It carries about 1,900 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 38 of the 62 inventoried bridges in Camas County rated fair (61.3%); 7 (11.3%) 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	Concrete stringer or multi-beam girder
Length	about 23 ft
Location	1.9 E. Fairfield
NBI structure number	000000000015060
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 20 over Willow Creek	2019	2,200	Good
US 20 over No Name Creek	1961	1,900	Fair
US 20 over Hot Creek	1961	1,900	Fair
US 20 over Arnold Creek	1961	1,900	Fair
US 20 over Chimney Cr.;sheep CR.	1961	1,900	Fair
US 20 over Corral Creek	1969	1,900	Fair