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Squaw Creek Rd over Squaw Creek

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

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

Squaw Creek Rd over Squaw Creek in Custer County, Idaho, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1960 and reconstructed in 1984, making it 65 years old at the 2025 inventory.
It carries about 330 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 14 of the 126 inventoried bridges in Custer County rated poor (11.1%); 14 (11.1%) 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	Prestressed concrete tee beam
Length	about 23 ft
Location	2.9 N. 3.5 W. Clayton
NBI structure number	000000000031740
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 93 over Garden Creek	1941	2,300	Fair
SH 21 over Crooked Creek	1968	2,200	Fair
US 93 over Big Lost River	1987	1,500	Fair
US 93 over Challis Creek	1991	1,400	Good
US 93 over Salmon River;challis Br.	1995	1,400	Good
Capitol Avenue over Swauger Slough	1940	1,220	Fair