SR 18 over Terrain

Good Condition25 years old25,373 vehicles/day

Location

StateWashington
CountyKing
Location6.3 E Jct SR 169
CarriesSR 18
CrossesTerrain
Coordinates47.45165, -121.95448

Condition Ratings

Overall ConditionGood
Deck7 (Good)
Superstructure8 (Very Good)
Substructure8 (Very Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length141.1 ft (43 m)
Max Span138.1 ft (42.1 m)
Deck Width52.2 ft (15.9 m)
Deck Area683.7 sq m
Main Spans1
Year Built2001

Traffic

Avg Daily Traffic25,373 (2023)
Truck Traffic17%
Lanes On Bridge3

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Structure Number0015927A0000000

Nearby Bridges

Issaquah-hobart RD over Holder Creek 1.5 mi Good SR 18 Ramp over Holder CR 1.5 mi Fair SR 18 over Holder CR Hobart RD 1.5 mi Good SR 18 over Holder CR Hobart RD 1.5 mi Good SR 18 Ramp over Holder CR & Hobart RD 1.5 mi Fair SE 188th ST over SR 18 1.9 mi Good SR 18 over Carey Creek 2.0 mi Good SR 18 over Carey Creek 2.0 mi Fair SR 18 over Carey Creek Tributary 2.2 mi Good SR 18 over Carey CR Trib 2.2 mi Fair