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Rock Creek Rd N over Rock Creek 029

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

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

Rock Creek Rd N over Rock Creek 029 in Park 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 2015, making it 10 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 27 of the 126 inventoried bridges in Park County rated good (21.4%); 13 (10.3%) 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


Structure	Prestressed concrete tee beam
Length	about 44 ft
Location	9M E Clyde Park
NBI structure number	L34019001+06001
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I 90 over Int West Livingston	1962	9,461	Fair
I 90 over Int West Livingston	1962	9,461	Fair
I 90 over Int S Livingston-us Hwy	1962	9,461	Fair
I 90 over Quinn Creek Road	2022	8,272	Good
I 90 over Quinn Creek Road	2022	8,272	Good
I 90 over Int Hopper	1978	8,236	Fair