HWY 91 N over Big Hole River 041

Poor Condition86 years old158 vehicles/day

Location

StateMontana
CountyBeaverhead
Location22m N Dillon
CarriesHWY 91 N
CrossesBig Hole River 041
Coordinates45.52664, -112.70197

Condition Ratings

Overall ConditionPoor
Deck4 (Poor)
Superstructure4 (Poor)
Substructure4 (Poor)
Channel/Waterway6 (Satisfactory)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length239.8 ft (73.1 m)
Max Span148.0 ft (45.1 m)
Deck Width21.3 ft (6.5 m)
Deck Area475.1 sq m
Main Spans1
Year Built1940

Traffic

Avg Daily Traffic158 (2023)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last Inspection724
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberL01311022+02001

Nearby Bridges