I 15 over Int Dearborn-missouri R

Fair Condition55 years old2,201 vehicles/day

Location

StateMontana
CountyCascade
Location6m N Craig
CarriesI 15
CrossesInt Dearborn-missouri R
Coordinates47.13299, -111.88681

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length849.7 ft (259 m)
Max Span180.1 ft (54.9 m)
Deck Width40.7 ft (12.4 m)
Deck Area3211.6 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic2,201 (2023)
Truck Traffic16%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last Inspection524
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00015240+04152

Nearby Bridges