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Willow Creek Rd over Willow Creek 061

Carbon County, Montana · rated Poor in the 2025 National Bridge Inventory

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

Willow Creek Rd over Willow Creek 061 in Carbon County, Montana, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1942 and reconstructed in 2003, making it 83 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2025).
Its listed owner is the county highway agency.
It is one of 4 of the 81 inventoried bridges in Carbon County rated poor (4.9%); 4 (4.9%) 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 32 ft
Location	7M SW Roberts
NBI structure number	L05010011+06001
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 310 over Sand Creek	1987	4,907	Good
US 310 over Rock Creek	1934	4,561	Fair
US 212 over Rock Creek	1974	3,817	Fair
US 212 over Rock Creek	2001	2,491	Good
US 310 over Bridger Creek	1971	1,932	Fair
US 310 over Clarks Fk Yellowstone	1971	1,932	Fair