US Bridges

I-90 over E Fk Issaquah CR

Fair

King County, Washington · 2.6 E JCT SR 900 · Structure no. 0009973A0000000

Built
1976
49 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
34,797
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over E Fk Issaquah CR is a prestressed concrete stringer/multi-beam or girder carrying I-90 over E Fk Issaquah CR in King County, Washington. It was built in 1976, so it is 49 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 34,797 vehicles a day, roughly 7% of them trucks, projected to reach 53,020 by 2039. The structure is 74 ft (22.6 m) long and 71 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-90
CrossesE Fk Issaquah CR
Location2.6 E JCT SR 900
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.53505, -122.01502
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length74 ft (22.6 m)
Longest span68 ft (20.7 m)
Deck width71 ft (21.6 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,797 (2023)
Projected traffic53,020 by 2039
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-90 over E Fk Issaquah CR built?

It was built in 1976, making it 49 years old in 2025.

What condition is I-90 over E Fk Issaquah CR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does I-90 over E Fk Issaquah CR carry?

About 34,797 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-90 over E Fk Issaquah CR?

The structure is 74 ft (22.6 m) long with a longest span of 68 ft (20.7 m) and a deck 71 ft wide.

Who owns I-90 over E Fk Issaquah CR?

It is owned by the State Highway Agency.