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Gap Rd over Highwood Creek 042

Chouteau County, Montana · rated Good in the 2025 National Bridge Inventory

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

Gap Rd over Highwood Creek 042 in Chouteau County, Montana, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2005, making it 20 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 25 of the 43 inventoried bridges in Chouteau County rated good (58.1%); 2 (4.7%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 60 ft
Location	8M S Big Sag
NBI structure number	L08233008+04001
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 87 over Abandoned Railroad	1974	1,727	Fair
Irr - US 87 over School Section Coulee	1970	1,694	Good
Irr - US 87 over Big Sandy Creek	1990	1,694	Good
US 87 over Marias River	1988	1,417	Good
S 80-13th St over Missouri River	1962	930	Poor
S 80 over RR	1953	849	Fair