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US 20 over I 15 Nb-sb;johns Hole Ic

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

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

US 20 over I 15 Nb-sb;johns Hole Ic in Bonneville 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 1962 and reconstructed in 1992, making it 63 years old at the 2025 inventory.
It carries about 24,000 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 69 of the 213 inventoried bridges in Bonneville County rated good (32.4%); 3 (1.4%) 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 tee beam
Length	about 195 ft
Location	In Idaho Falls
NBI structure number	000000000012310
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 20 over Porter Canal	1966	38,000	Fair
US 20 Ebl & Wbl over Snake R.;johns Hole Br.	1966	38,000	Fair
US 20 over Sma 7096;RIVERSIDE Dr.ic	1969	38,000	Fair
US 20 over Sage Canal	1970	34,500	Fair
US 20 over UPRR	1966	32,000	Fair
US 20 Wbl & Ebl over Sma 7076;LINDSAY Blvd.ic	1966	32,000	Fair