Dalton Highway over South Fork Koyukuk River

Fair Condition54 years old140 vehicles/day

Location

StateAlaska
CountyYukon-Koyukuk
LocationMile Point 155.8
CarriesDalton Highway
CrossesSouth Fork Koyukuk River
Coordinates67.01857, -150.28900

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Channel/Waterway8 (Very Good)
Scour CriticalUnknown

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length422.9 ft (128.9 m)
Max Span60.0 ft (18.3 m)
Deck Width27.6 ft (8.4 m)
Deck Area1082.8 sq m
Main Spans6
Year Built1972 (reconstructed 1992)

Traffic

Avg Daily Traffic140 (2020)
Truck Traffic74%
Lanes On Bridge2

Inspection & Ownership

Last Inspection724
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number1260