HWY 100 over Viaduct

Fair Condition112 years old901 vehicles/day

Location

StateOregon
CountyMultnomah
Location0.3 Mi E Multnomah Falls
CarriesHWY 100
CrossesViaduct
Coordinates45.57929, -122.11088

Condition Ratings

Overall ConditionFair
Deck5 (Fair)
Superstructure5 (Fair)
Substructure5 (Fair)
Scour CriticalNot applicable

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length860.9 ft (262.4 m)
Max Span9.8 ft (3 m)
Deck Width20.0 ft (6.1 m)
Deck Area1600.6 sq m
Main Spans86
Year Built1914

Traffic

Avg Daily Traffic901 (2022)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last Inspection923
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Structure Number00841 125 02003

Nearby Bridges

HWY 100 over Multnomah Creek 0.3 mi Fair HWY 100 over Viaduct 0.5 mi Poor Road over Multnomah Creek 1.2 mi Fair Road over Big John Creek 1.3 mi Fair HWY 100 over Oneonta Gorge Creek 1.9 mi Fair HWY 002 over Horsetail & Oneonta Ck 1.9 mi Fair HWY 100 over Horsetail Falls 2.2 mi Fair I-84 (hwy 002) EB over HWY 100 & Uprr 3.4 mi Fair I-84 (hwy 002) WB over HWY 100 & Uprr 3.4 mi Fair Bridal Veil Conn over I-84 (hwy 002) 3.5 mi Fair