South Tongass HWY over Water ST Viaduct

Poor Condition71 years old14,046 vehicles/day

Location

StateAlaska
CountyKetchikan Gateway
LocationMile Point 1.7
CarriesSouth Tongass HWY
CrossesWater ST Viaduct
Coordinates55.34389, -131.65111

Condition Ratings

Overall ConditionPoor
Deck7 (Good)
Superstructure5 (Fair)
Substructure4 (Poor)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length1624.0 ft (495 m)
Max Span19.0 ft (5.8 m)
Deck Width53.1 ft (16.2 m)
Deck Area8,019 sq m
Main Spans81
Year Built1955

Traffic

Avg Daily Traffic14,046 (2018)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last Inspection623
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0797

Nearby Bridges

Hopkins Alley over Bauer-hopkins Trestle 0.1 mi Fair Bayview Street over Bayview Street Viaduct 0.1 mi Good Warren Street over Warren ST Viaduct 0.1 mi Good Harding Street over Harding Street 0.2 mi Poor South Tongass HWY over Front Street Viaduct 0.2 mi Fair Grant Street over Grant Street Viaduct 0.2 mi Fair Young St/sayles ST over Dunton ST Viaduct 0.2 mi Fair South Tongass HWY over Front And Mill ST Viad 0.3 mi Good Millar Street over Millar ST Viaduct 0.3 mi Good Park Street over Ketchikan CR Park-lower 0.3 mi Fair