US Bridges

E-E Ramp over I-90 Ramps Mercer Sl

Good

King County, Washington · 6.4 E JCT I-5 · Structure no. 0013846A0000000

Built
1993
32 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
1,333 ft
6 main spans
Daily traffic
1,375
2012 count
Owner
State
State Highway Agency

About this bridge

E-E Ramp over I-90 Ramps Mercer Sl is a steel continuous box beam or girders - single or spread carrying E-E Ramp over I-90 Ramps Mercer Sl in King County, Washington. It was built in 1993, so it is 32 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,375 vehicles a day, roughly 5% of them trucks, projected to reach 2,299 by 2036. The structure is 1,333 ft (406.3 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesE-E Ramp
CrossesI-90 Ramps Mercer Sl
Location6.4 E JCT I-5
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.57965, -122.19256
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating38 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+3 approach)
Design loadHS 20 + Mod
Structure length1,333 ft (406.3 m)
Longest span260 ft (79.2 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,375 (2012)
Projected traffic2,299 by 2036
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$17.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was E-E Ramp over I-90 Ramps Mercer Sl built?

It was built in 1993, making it 32 years old in 2025.

What condition is E-E Ramp over I-90 Ramps Mercer Sl in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does E-E Ramp over I-90 Ramps Mercer Sl carry?

About 1,375 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is E-E Ramp over I-90 Ramps Mercer Sl?

The structure is 1,333 ft (406.3 m) long with a longest span of 260 ft (79.2 m) and a deck 29 ft wide.

Who owns E-E Ramp over I-90 Ramps Mercer Sl?

It is owned by the State Highway Agency.