US Bridges

405 N-E Ramp over 116th Ave NE

Good

King County, Washington · 3.8 N JCT I-90 · Structure no. 0017726C0000000

Built
2011
14 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
121 ft
1 main span
Daily traffic
27,000
2011 count
Owner
State
State Highway Agency

About this bridge

405 N-E Ramp over 116th Ave NE is a prestressed concrete continuous stringer/multi-beam or girder carrying 405 N-E Ramp over 116th Ave NE 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 27,000 vehicles a day, roughly 3% of them trucks, projected to reach 45,900 by 2036. The structure is 121 ft (36.9 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries405 N-E Ramp
Crosses116th Ave NE
Location3.8 N JCT I-90
RouteInterstate 405
CountyKing County
StateWashington
Coordinates47.63161, -122.18589
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.8 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length121 ft (36.9 m)
Longest span115 ft (35.1 m)
Deck width40 ft (12.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,000 (2011)
Projected traffic45,900 by 2036
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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$1.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 405 N-E Ramp over 116th Ave NE built?

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

What condition is 405 N-E Ramp over 116th Ave NE 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 August 2024.

How much traffic does 405 N-E Ramp over 116th Ave NE carry?

About 27,000 vehicles per day (2011 count), of which roughly 3% are trucks.

How long is 405 N-E Ramp over 116th Ave NE?

The structure is 121 ft (36.9 m) long with a longest span of 115 ft (35.1 m) and a deck 40 ft wide.

Who owns 405 N-E Ramp over 116th Ave NE?

It is owned by the State Highway Agency.