I 90 over Clark Fork River

Fair Condition47 years old4,584 vehicles/day

Location

StateMontana
CountyMissoula
Location5m E Alberton
CarriesI 90
CrossesClark Fork River
Coordinates47.01346, -114.40910

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure6 (Satisfactory)
Substructure7 (Good)
Channel/Waterway6 (Satisfactory)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1019.7 ft (310.8 m)
Max Span151.9 ft (46.3 m)
Deck Width44.3 ft (13.5 m)
Deck Area4195.8 sq m
Main Spans8
Year Built1979

Traffic

Avg Daily Traffic4,584 (2023)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090080+03411

Nearby Bridges

I 90 over Clark Fork River 0.0 mi Fair HWY 10 W over Ninemile Creek 035 1.3 mi Poor I 90 over Clark Fork River 1.3 mi Poor W Ninemile RD over Ninemile Creek 030 1.4 mi Fair HWY 10 W over Ninemile Slide 026 1.5 mi Poor I 90 over Int Nine Mile 2.0 mi Fair I 90 over Int Nine Mile 2.0 mi Fair I 90 over Int Lothrop 2.2 mi Fair I 90 over Int Lothrop 2.2 mi Fair Petty Creek RD over Clark Fork 008 2.3 mi Fair