US Bridges

I-90 EB over Sunset Creek

Good

King County, Washington · 0.5 E JCT I-405 · Structure no. 0019750B0000000

Built
2024
1 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
154 ft
1 main span
Daily traffic
139,482
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 EB over Sunset Creek is a prestressed concrete stringer/multi-beam or girder carrying I-90 EB over Sunset Creek in King County, Washington. It was built in 2024, so it is 1 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 139,482 vehicles a day, roughly 3% of them trucks, projected to reach 99,011 by 2042. The structure is 154 ft (47 m) long and 96 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90 EB
CrossesSunset Creek
Location0.5 E JCT I-405
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.57983, -122.16152
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating36.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length154 ft (47 m)
Longest span148 ft (45.2 m)
Deck width96 ft (29.4 m)
Roadway width94 ft (28.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic139,482 (2023)
Projected traffic99,011 by 2042
Trucks3%
Lanes on structure6
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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$7.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-90 EB over Sunset Creek built?

It was built in 2024, making it 1 years old in 2025.

What condition is I-90 EB over Sunset Creek 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 2024.

How much traffic does I-90 EB over Sunset Creek carry?

About 139,482 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is I-90 EB over Sunset Creek?

The structure is 154 ft (47 m) long with a longest span of 148 ft (45.2 m) and a deck 96 ft wide.

Who owns I-90 EB over Sunset Creek?

It is owned by the State Highway Agency.