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Frontage Road 120 over Valley Creek 048

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

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

Frontage Road 120 over Valley Creek 048 in Stillwater County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1969, making it 56 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2025).
Its listed owner is the state highway agency.
It is one of 63 of the 92 inventoried bridges in Stillwater County rated fair (68.5%); 1 (1.1%) 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	Prestressed concrete stringer or multi-beam girder
Length	about 143 ft
Location	1M W Park City
NBI structure number	L48120000+02001
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I 90 over Cove Irrigation Ditch	1970	12,321	Good
I 90 over Int Exit 396	1963	10,845	Fair
I 90 over Int Park City	1967	7,580	Fair
I 90 over Int Park City	1967	7,580	Fair
I 90 over Sep Pope Road	1967	7,580	Fair
I 90 over Sep Pope Road	1967	7,580	Fair