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County Road 548 over Musselshell River 025

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

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

County Road 548 over Musselshell River 025 in Musselshell County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 2013, making it 12 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 11 of the 28 inventoried bridges in Musselshell County rated fair (39.3%); 1 (3.6%) 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 116 ft
Location	Roundup
NBI structure number	L33548000+00001
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 87 over Musselshell River	1996	2,799	Good
US 87 over Park Coulee	1995	2,548	Good
US 87 over Razor Creek	1995	2,548	Good
US 87 over South Willow Creek	1976	1,223	Good
US 12 over Willow Creek	1999	712	Fair
US 12 over Drainage	2003	480	Good