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Parkinson Road over Cub River

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

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

Parkinson Road over Cub River in Franklin 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 1926, making it 99 years old at the 2025 inventory.
It carries about 310 vehicles a day (traffic count year 2023).
Its listed owner is a city or municipal highway agency.
It is one of 2 of the 23 inventoried bridges in Franklin County rated poor (8.7%); 2 (8.7%) 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	Concrete stringer or multi-beam girder
Length	about 50 ft
Location	In Franklin;parkinson Rd.
NBI structure number	000000000023345
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 91 over Cub River	2006	8,600	Fair
US 91 over Bear River	2006	4,200	Fair
SH 36 over Bear River	2018	3,000	Good
SH 34 over Bear River;riverdale Br	1960	2,800	Fair
US 91 over West Cache Canal	1993	2,300	Good
SH 36 over Bear River	1960	1,300	Fair