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US 212 Fh 59 over Rock Creek

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

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

US 212 Fh 59 over Rock Creek in Carbon County, Montana, 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 1965, making it 60 years old at the 2025 inventory.
It carries about 721 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 31 of the 81 inventoried bridges in Carbon County rated good (38.3%); 4 (4.9%) 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 136 ft
Location	8M SW Red Lodge
NBI structure number	P00028059+04791
Condition class	Good

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