I 90 over Sep Thorpe Road

Fair Condition61 years old9,726 vehicles/day

Location

StateMontana
CountyGallatin
Location5m W Belgrade
CarriesI 90
CrossesSep Thorpe Road
Coordinates45.81687, -111.25897

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Scour CriticalNot applicable

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length113.8 ft (34.7 m)
Max Span40.0 ft (12.2 m)
Deck Width41.0 ft (12.5 m)
Deck Area433.8 sq m
Main Spans3
Year Built1965

Traffic

Avg Daily Traffic9,726 (2023)
Truck Traffic12%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last Inspection624
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090293+02131

Nearby Bridges

I 90 over Sep Thorpe Road 0.0 mi Fair I 90 over Gallatin River 0.8 mi Fair I 90 over Gallatin River 0.8 mi Fair Frontage Rd-s 205 over Gallatin River 0.8 mi Fair I 90 over Sep Heeb Road 1.6 mi Good I 90 over Sep Heeb Road 1.6 mi Fair Heeb RD over Baker Creek 080 1.6 mi Fair Stagecoach Trl RD over Baker Creek 082 2.1 mi Poor Stagecoach Trl RD over Baker Creek Overflow 081 2.2 mi Fair I 90 over Baker Creek 2.3 mi Good