US Bridges

Hov On/Off Ramp over I-90

Good

King County, Washington · 1.2 E JCT I-405 · Structure no. 0016879A0000000

Built
2006
19 years old
Condition
Good
inspected March 2024
Type
Girder and Floorbeam System
Prestressed Concrete Continuous
Length
161 ft
7 main spans
Daily traffic
583
2022 count
Owner
State
State Highway Agency

About this bridge

Hov On/Off Ramp over I-90 is a prestressed concrete continuous girder and floorbeam system carrying Hov On/Off Ramp over I-90 in King County, Washington. It was built in 2006, so it is 19 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 583 vehicles a day, roughly 2% of them trucks, projected to reach 975 by 2039. The structure is 161 ft (49.1 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHov On/Off Ramp
CrossesI-90
Location1.2 E JCT I-405
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.5795, -122.15183
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMarch 2024
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 typeGirder and Floorbeam System
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHL 93
Structure length161 ft (49.1 m)
Longest span33 ft (10.1 m)
Deck width73 ft (22.2 m)
Roadway width49 ft (15 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic583 (2022)
Projected traffic975 by 2039
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
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$2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hov On/Off Ramp over I-90 built?

It was built in 2006, making it 19 years old in 2025.

What condition is Hov On/Off Ramp over I-90 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 March 2024.

How much traffic does Hov On/Off Ramp over I-90 carry?

About 583 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Hov On/Off Ramp over I-90?

The structure is 161 ft (49.1 m) long with a longest span of 33 ft (10.1 m) and a deck 73 ft wide.

Who owns Hov On/Off Ramp over I-90?

It is owned by the State Highway Agency.