I 90 over Int Phosphate

Fair Condition53 years old5,136 vehicles/day

Location

StateMontana
CountyPowell
Location3.7m W Garrison
CarriesI 90
CrossesInt Phosphate
Coordinates46.55678, -112.87012

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure7 (Good)
Substructure5 (Fair)
Scour CriticalNot applicable

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length143.0 ft (43.6 m)
Max Span57.1 ft (17.4 m)
Deck Width44.9 ft (13.7 m)
Deck Area597.3 sq m
Main Spans3
Year Built1973

Traffic

Avg Daily Traffic5,136 (2023)
Truck Traffic22%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090170+02412

Nearby Bridges

I 90 over Int Phosphate 0.0 mi Fair I 90 over Rr 0.2 mi Poor I 90 EB over Rr 0.2 mi Poor I 90 over Sep Garrison Frontage RD 1.5 mi Fair I 90 over Sep Garrison Frontage RD 1.5 mi Fair Sawmill RD over Rock Creek 047 3.5 mi Good Gold Creek RD over Clark Fork River 032 3.6 mi Fair I 90 EB over Int Gold Creek 3.7 mi Fair I 90 WB over Int Gold Creek 3.7 mi Fair I 90 over Int W Garrison-rr 3.7 mi Poor