US Bridges

I-90 Ramp over E Fk Issaquah Creek

Fair

King County, Washington · 2.4 E JCT SR 900 · Structure no. 0009840E0000000

Built
1976
49 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
125 ft
1 main span
Daily traffic
3,805
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 Ramp over E Fk Issaquah Creek is a prestressed concrete stringer/multi-beam or girder carrying I-90 Ramp over E Fk Issaquah Creek 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 3,805 vehicles a day, roughly 6% of them trucks, projected to reach 6,030 by 2039. The structure is 125 ft (38.1 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-90 Ramp
CrossesE Fk Issaquah Creek
Location2.4 E JCT SR 900
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.53322, -122.01942
Functional classUrban 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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length125 ft (38.1 m)
Longest span120 ft (36.6 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,805 (2023)
Projected traffic6,030 by 2039
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-90 Ramp over E Fk Issaquah Creek built?

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

What condition is I-90 Ramp over E Fk Issaquah Creek 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 October 2024.

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

About 3,805 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-90 Ramp over E Fk Issaquah Creek?

The structure is 125 ft (38.1 m) long with a longest span of 120 ft (36.6 m) and a deck 29 ft wide.

Who owns I-90 Ramp over E Fk Issaquah Creek?

It is owned by the State Highway Agency.