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Two Mile Bridge Rd over Rock Creek 024

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

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

Two Mile Bridge Rd over Rock Creek 024 in Carbon County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1982, making it 43 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 46 of the 81 inventoried bridges in Carbon County rated fair (56.8%); 4 (4.9%) 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	Prestressed concrete tee beam
Length	about 90 ft
Location	2M N Red Lodge
NBI structure number	L05103000+02001
Condition class	Fair

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