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US 12 over Little Blackfoot River

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

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

US 12 over Little Blackfoot River in Powell 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 1988, making it 37 years old at the 2025 inventory.
It carries about 3,430 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 70 of the 113 inventoried bridges in Powell County rated fair (61.9%); 7 (6.2%) 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 stringer or multi-beam girder
Length	about 71 ft
Location	1M E Elliston
NBI structure number	P00008022+02651
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I 90 over Dempsey Creek	1973	10,708	Fair
I 90 over Jr Grade Sep	1961	10,463	Fair
I 90 over Jr Grade Sep	1961	10,463	Fair
I 90 over Int Jens	1959	5,992	Fair
I 90 over Int Jens	1959	5,992	Fair
I 90 EB over Int Gold Creek	1959	5,992	Fair