I 90 over Clark Fork River

Poor Condition62 years old9,168 vehicles/day

Location

StateMontana
CountyMissoula
Location6.2m E Alberton
CarriesI 90
CrossesClark Fork River
Coordinates47.02203, -114.38354

Condition Ratings

Overall ConditionPoor
Deck4 (Poor)
Superstructure5 (Fair)
Substructure6 (Satisfactory)
Channel/Waterway6 (Satisfactory)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length981.6 ft (299.2 m)
Max Span160.1 ft (48.8 m)
Deck Width63.6 ft (19.4 m)
Deck Area5804.5 sq m
Main Spans4
Year Built1964

Traffic

Avg Daily Traffic9,168 (2023)
Truck Traffic20%
Lanes On Bridge4

Inspection & Ownership

Last Inspection324
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090081+08401

Nearby Bridges

HWY 10 W over Ninemile Slide 026 0.3 mi Poor HWY 10 W over Ninemile Creek 035 0.7 mi Poor W Ninemile RD over Ninemile Creek 030 0.8 mi Fair I 90 over Int Nine Mile 0.8 mi Fair I 90 over Int Nine Mile 0.8 mi Fair I 90 over Clark Fork River 1.3 mi Fair I 90 over Clark Fork River 1.3 mi Fair Huson RD over Int Huson-i 90 012 2.9 mi Good I 90 over Int Lothrop 3.5 mi Fair I 90 over Int Lothrop 3.5 mi Fair