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4-h Rd over Musselshell River 008

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

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

4-h Rd over Musselshell River 008 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 5 (fair condition) on the 0-9 scale.
It was built in 1970, making it 55 years old at the 2025 inventory.
It carries about 208 vehicles a day (traffic count year 2023).
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	Timber stringer or multi-beam girder
Length	about 150 ft
Location	SE Roundup
NBI structure number	L33006015+07001
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