US Bridges

N-E Ramp over Cd Ramp and Terrain

Good

King County, Washington · 2.8 N JCT I-90 · Structure no. 0017726B0000000

Built
2011
14 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
747 ft
8 main spans
Daily traffic
9,425
2012 count
Owner
State
State Highway Agency

About this bridge

N-E Ramp over Cd Ramp and Terrain is a prestressed concrete continuous stringer/multi-beam or girder carrying N-E Ramp over Cd Ramp and Terrain in King County, Washington. It was built in 2011, so it is 14 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 9,425 vehicles a day, roughly 3% of them trucks, projected to reach 15,759 by 2036. The structure is 747 ft (227.7 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN-E Ramp
CrossesCd Ramp and Terrain
Location2.8 N JCT I-90
RouteInterstate 405
CountyKing County
StateWashington
Coordinates47.61936, -122.18831
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHL 93
Structure length747 ft (227.7 m)
Longest span115 ft (35.1 m)
Deck width29 ft (8.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,425 (2012)
Projected traffic15,759 by 2036
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$11.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was N-E Ramp over Cd Ramp and Terrain built?

It was built in 2011, making it 14 years old in 2025.

What condition is N-E Ramp over Cd Ramp and Terrain 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 November 2023.

How much traffic does N-E Ramp over Cd Ramp and Terrain carry?

About 9,425 vehicles per day (2012 count), of which roughly 3% are trucks.

How long is N-E Ramp over Cd Ramp and Terrain?

The structure is 747 ft (227.7 m) long with a longest span of 115 ft (35.1 m) and a deck 29 ft wide.

Who owns N-E Ramp over Cd Ramp and Terrain?

It is owned by the State Highway Agency.