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Prospect Dr over Grant Creek 001

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

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

Prospect Dr over Grant Creek 001 in Missoula 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 1981, making it 44 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2025).
Its listed owner is a city or municipal highway agency.
It is one of 66 of the 206 inventoried bridges in Missoula County rated good (32.0%); 15 (7.3%) 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

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

Bridge	Built	Vehicles/day	Condition
N Reserve St over Clark Fork R Flood Plain	1977	35,914	Fair
N Reserve St over Clark Fork River	1975	35,914	Fair
Reserve St over W Broadway St-rr	1998	29,572	Fair
Brooks St-us 12 over Bitterroot River	1968	28,185	Fair
I 90 over Grant Creek	1965	27,328	Good
N Russel Street over Clark Fork River	2020	23,274	Good