US Bridges

N-E Ramp over SE 8th ST

Good

King County, Washington · 1.7 N JCT I-90 · Structure no. 0016277A0000000

Built
2003
22 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
525 ft
6 main spans
Daily traffic
6,904
2023 count
Owner
State
State Highway Agency

About this bridge

N-E Ramp over SE 8th ST is a prestressed concrete continuous stringer/multi-beam or girder carrying N-E Ramp over SE 8th ST in King County, Washington. It was built in 2003, so it is 22 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,904 vehicles a day, roughly 1% of them trucks, projected to reach 10,454 by 2039. The structure is 525 ft (160 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesN-E Ramp
CrossesSE 8th ST
Location1.7 N JCT I-90
RouteInterstate 405
CountyKing County
StateWashington
Coordinates47.60297, -122.18331
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length525 ft (160 m)
Longest span110 ft (33.5 m)
Deck width30 ft (9 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,904 (2023)
Projected traffic10,454 by 2039
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$7.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was N-E Ramp over SE 8th ST built?

It was built in 2003, making it 22 years old in 2025.

What condition is N-E Ramp over SE 8th ST 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 February 2023.

How much traffic does N-E Ramp over SE 8th ST carry?

About 6,904 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is N-E Ramp over SE 8th ST?

The structure is 525 ft (160 m) long with a longest span of 110 ft (33.5 m) and a deck 30 ft wide.

Who owns N-E Ramp over SE 8th ST?

It is owned by the State Highway Agency.