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SH 75 over Big Wood River

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

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

SH 75 over Big Wood River in Blaine County, Idaho, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2002, making it 23 years old at the 2025 inventory.
It carries about 14,500 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 27 of the 96 inventoried bridges in Blaine County rated good (28.1%); 4 (4.2%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 184 ft
Location	6.2 S. Ketchum
NBI structure number	000000000017666
Condition class	Good

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	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
US 93 over Little Wood River	1977	2,900	Fair