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Petty Creek Rd over Clark Fork 008

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

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

Petty Creek Rd over Clark Fork 008 in Missoula County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1964, making it 61 years old at the 2025 inventory.
It carries about 948 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 125 of the 206 inventoried bridges in Missoula County rated fair (60.7%); 15 (7.3%) 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	Continuous steel girder and floorbeam
Length	about 457 ft
Location	2M E Alberton
NBI structure number	L32090000+01001
Condition class	Fair

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