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SH 39 Sbl over Snake R.;am.falls Br.

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

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

SH 39 Sbl over Snake R.;am.falls Br. in Power County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1975, making it 50 years old at the 2025 inventory.
It carries about 2,900 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 47 of the 71 inventoried bridges in Power County rated fair (66.2%); 1 (1.4%) 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	Continuous steel girder and floorbeam
Length	about 1,144 ft
Location	0.7 W. American Falls
NBI structure number	000000000014145
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I 86 & Ramps over Lanes Gulch	1981	8,300	Fair
I 86 Wbl & Ebl over Cannell Ln;machine Pass	1980	8,300	Fair
I 86 Wbl & Ebl over Calls Road Gs	1979	8,000	Good
I 86 Ebl over Uprr;pocatello Airport	1968	6,750	Fair
I 86 Wbl over Uprr;pocatello Airport	1968	6,750	Fair
I 86 Ebl over Portneuf River	1968	6,750	Fair