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Fdr over South Fork Boise River

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

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

Fdr over South Fork Boise River in Camas County, Idaho, 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 1989, making it 36 years old at the 2025 inventory.
It carries about 12 vehicles a day (traffic count year 1980).
It is one of 7 of the 62 inventoried bridges in Camas County rated poor (11.3%); 7 (11.3%) 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	Timber stringer or multi-beam girder
Length	about 69 ft
Location	Skunk Creek-so Fk Junct.
NBI structure number	041405000001004
Condition class	Poor

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