20th RD NE over Sep I 15 001

Good Condition49 years old100 vehicles/day

Location

StateMontana
CountyTeton
Location4m N Dutton
Carries20th RD NE
CrossesSep I 15 001
Coordinates47.89936, -111.71853

Condition Ratings

Overall ConditionGood
Deck7 (Good)
Superstructure7 (Good)
Substructure7 (Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length297.9 ft (90.8 m)
Max Span107.0 ft (32.6 m)
Deck Width30.2 ft (9.2 m)
Deck Area835.4 sq m
Main Spans4
Year Built1977

Traffic

Avg Daily Traffic100 (2025)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last Inspection823
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberL50069002+07001

Nearby Bridges

I 15 over Teton River 1.7 mi Fair I 15 over Teton River 1.7 mi Good 13th LN NE over Teton River 099 2.0 mi Fair I 15 over Int Main ST 3.5 mi Fair I 15 over Int Main ST 3.6 mi Fair 24th RD NE over Int Collins RD I 15 003 4.2 mi Good 8th LN NE over Teton River 049 4.9 mi Good 8th LN NE over Muddy Creek 015 4.9 mi Fair