US Bridges

EB I-90 over Olallie Creek

Fair

King County, Washington · 18.2 E JCT SR 202 · Structure no. 086141000000000

Built
1972
53 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
18,894
2023 count
Owner
State
State Highway Agency

About this bridge

EB I-90 over Olallie Creek is a concrete continuous culvert carrying EB I-90 over Olallie Creek in King County, Washington. It was built in 1972, so it is 53 years old, older 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 18,894 vehicles a day, roughly 18% of them trucks, projected to reach 25,526 by 2039. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesEB I-90
CrossesOlallie Creek
Location18.2 E JCT SR 202
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.39444, -121.46242
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,894 (2023)
Projected traffic25,526 by 2039
Trucks18%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$742,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was EB I-90 over Olallie Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is EB I-90 over Olallie 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 July 2024.

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

About 18,894 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is EB I-90 over Olallie Creek?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.4 m).

Who owns EB I-90 over Olallie Creek?

It is owned by the State Highway Agency.