SR 522 over Sammamish River

Fair Condition58 years old25,269 vehicles/day

Location

StateWashington
CountyKing
LocationJct I-405
CarriesSR 522
CrossesSammamish River
Coordinates47.75911, -122.18008

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure7 (Good)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length2335.0 ft (711.7 m)
Max Span120.1 ft (36.6 m)
Deck Width36.4 ft (11.1 m)
Deck Area7899.9 sq m
Main Spans22
Year Built1968

Traffic

Avg Daily Traffic25,269 (2023)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge18

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0008382H0000000

Nearby Bridges

SR 522 over E-n Ramp Br 0.2 mi Good I-405 over Terrain 0.2 mi Good I-405 N-e Ramp over Sammamish River 0.3 mi Fair I-405 N-w Ramp over Sammamish R I-405 SR 5 0.3 mi Fair SR 522 Ramp over Sammamish River 0.3 mi Fair I-405 over SR 522 Sammamish R 0.3 mi Fair I-405 over SR 522 Sammamish R 0.4 mi Fair SR 522 over North CR & Gillman Trail 0.4 mi Good SR 522 over North CR & Gillman Trail 0.4 mi Good SR 522 over North CR & Gillman Trail 0.4 mi Good