I 15 over Missouri River-local

Fair Condition55 years old2,201 vehicles/day

Location

StateMontana
CountyCascade
Location7m N Craig
CarriesI 15
CrossesMissouri River-local
Coordinates47.13870, -111.86131

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure6 (Satisfactory)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length791.7 ft (241.3 m)
Max Span143.0 ft (43.6 m)
Deck Width39.7 ft (12.1 m)
Deck Area2919.7 sq m
Main Spans5
Year Built1971

Traffic

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

Inspection & Ownership

Last Inspection624
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00015241+08671

Nearby Bridges