Diablo Dam RD over Diablo Gorge

Fair Condition64 years old580 vehicles/day

Location

StateWashington
CountyKing
LocationDiablo Access Road
CarriesDiablo Dam RD
CrossesDiablo Gorge
Coordinates48.71231, -121.13392

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure6 (Satisfactory)
Scour CriticalNot applicable

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length44.9 ft (13.7 m)
Max Span44.0 ft (13.4 m)
Deck Width19.7 ft (6 m)
Deck Area82.2 sq m
Main Spans1
Year Built1962

Traffic

Avg Daily Traffic580 (2022)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last Inspection822
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Structure Number087462000000000

Nearby Bridges

Diablo Access RD over Diablo Gorge 0.0 mi Fair Diablo Access Road over Skagit River 0.1 mi Fair Diablo Dam Access over Skagit River 0.1 mi Fair Diablo Dam Access over Skagit River 0.2 mi Fair Diablo Camp Road over Diablo Tailrace 0.4 mi Fair Diablo ST over Stetattle Creek 0.8 mi Fair SR 20 over Skagit R 1.1 mi Good SR 20 over Sidehill 2.0 mi Good SR 20 over Colonial Creek 2.0 mi Good SR 20 over Thunder Arm Bay 2.3 mi Fair