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Kilpatrick Br. Rd. over Silver Creek

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

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

Kilpatrick Br. Rd. over Silver Creek in Blaine 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 2 (critical condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 60 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 4 of the 96 inventoried bridges in Blaine County rated poor (4.2%); 4 (4.2%) 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	Steel stringer or multi-beam girder
Length	about 64 ft
Location	0.5 N. 3.5 W. Picabo
NBI structure number	000000000023780
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
SH 75 over Big Wood River	2002	14,500	Good
SH 75 over Big Wood River	2017	14,500	Fair
SH 75 over Bellevue Canal	1931	7,000	Fair
STC2815;WARM Sprng over Big Wood River	1972	6,300	Fair
Dollar Road over Trail Creek	1988	5,000	Good
SH 75 over Richfield Canal	1955	4,500	Fair