IRR - US 93 over Flathead River

Fair Condition60 years old8,557 vehicles/day

Location

StateMontana
CountyLake
LocationPolson
CarriesIRR - US 93
CrossesFlathead River
Coordinates47.69518, -114.16883

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure5 (Fair)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1536.7 ft (468.4 m)
Max Span62.0 ft (18.9 m)
Deck Width38.4 ft (11.7 m)
Deck Area5480.3 sq m
Main Spans25
Year Built1966

Traffic

Avg Daily Traffic8,557 (2023)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last Inspection424
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberP00005061+01811

Nearby Bridges