I 15 over Sep Silver Ave-basin CR

Fair Condition41 years old3,182 vehicles/day

Location

StateMontana
CountyJefferson
LocationBasin
CarriesI 15
CrossesSep Silver Ave-basin CR
Coordinates46.26965, -112.26044

Condition Ratings

Overall ConditionFair
Deck5 (Fair)
Superstructure5 (Fair)
Substructure6 (Satisfactory)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length201.1 ft (61.3 m)
Max Span60.7 ft (18.5 m)
Deck Width84.3 ft (25.7 m)
Deck Area1575.4 sq m
Main Spans2
Year Built1985

Traffic

Avg Daily Traffic3,182 (2023)
Truck Traffic16%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00015156+02661

Nearby Bridges

I 15 Frontage RD over Basin Creek 041 0.1 mi Poor Basin ST over Basin Creek 040 0.1 mi Fair I 15 over Boulder River 0.3 mi Fair I 15 Frontage RD over Boulder River 042 0.3 mi Fair Basin Creek RD over Basin Creek 032 0.5 mi Fair I 15 over Int Basin 0.6 mi Fair I 15 over Boulder River 0.7 mi Fair I 15 Frontage RD over Cataract Creek 030 0.9 mi Poor I 15 over Boulder River 1.2 mi Fair I 15 Frontage RD over Boulder River 043 1.2 mi Fair