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US 191 over Drainage

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

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

US 191 over Drainage in Wheatland County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1942, making it 83 years old at the 2025 inventory.
It carries about 706 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 14 of the 27 inventoried bridges in Wheatland County rated fair (51.9%); 4 (14.8%) 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 38 ft
Location	12M S Harlowton
NBI structure number	P00045031+06261
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 191 over RR	2009	2,316	Good
Third St NE over Abandoned Rr-antelope CR	1939	2,063	Poor
US 191 over Musselshell River	1969	805	Good
US 191 over Abandoned RR	1969	805	Good
US 191 over S Fork American Fork	1941	706	Poor
US 191 over American Fork	1942	706	Fair