I-90 S-e Ramp over I-90 Mercer Slough

Fair Condition56 years old8,091 vehicles/day

Location

StateWashington
CountyKing
Location6.4 E Jct I-5
CarriesI-90 S-e Ramp
CrossesI-90 Mercer Slough
Coordinates47.58001, -122.18904

Condition Ratings

Overall ConditionFair
Deck5 (Fair)
Superstructure6 (Satisfactory)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length1929.1 ft (588 m)
Max Span151.9 ft (46.3 m)
Deck Width27.6 ft (8.4 m)
Deck Area4939.2 sq m
Main Spans20
Year Built1970

Traffic

Avg Daily Traffic8,091 (2012)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge11

Inspection & Ownership

Last Inspection223
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0008610E0000000

Nearby Bridges

I-90 over Mercer Slough 0.1 mi Poor I-90 over Mercer Sl 0.1 mi Poor I-90 over Mercer Slough 0.1 mi Fair I-90 over Mercer Slough 0.1 mi Fair I-90 over Mercer Slough 0.2 mi Fair E-e Ramp over I-90 Ramps Mercer Sl 0.2 mi Good I-90 W-n Ramp over I-90 Wbcd 0.3 mi Fair I-90 Ramp over Mercer Slough I-90 0.5 mi Good Skagit Key over Coal Creek 0.5 mi Good Newport Key over Coal Creek 0.6 mi Good