US Bridges

I-90 over S Cle Elum RD & BNSF RR

Fair

Kittitas County, Washington · 28.8 E JCT SR 906 · Structure no. 0007664B0000000

Built
1966
59 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
425 ft
5 main spans
Daily traffic
14,587
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over S Cle Elum RD & BNSF RR is a concrete continuous box beam or girders - multiple carrying I-90 over S Cle Elum RD & BNSF RR in Kittitas County, Washington. It was built in 1966, so it is 59 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 5 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 14,587 vehicles a day, roughly 23% of them trucks, projected to reach 18,088 by 2039. The structure is 425 ft (129.5 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesS Cle Elum RD & BNSF RR
Location28.8 E JCT SR 906
RouteInterstate 90
CountyKittitas County
StateWashington
Coordinates47.19298, -120.94995
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating24.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length425 ft (129.5 m)
Longest span154 ft (46.9 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,587 (2023)
Projected traffic18,088 by 2039
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$8.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 over S Cle Elum RD & BNSF RR built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-90 over S Cle Elum RD & BNSF RR 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 June 2023.

How much traffic does I-90 over S Cle Elum RD & BNSF RR carry?

About 14,587 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I-90 over S Cle Elum RD & BNSF RR?

The structure is 425 ft (129.5 m) long with a longest span of 154 ft (46.9 m) and a deck 35 ft wide.

Who owns I-90 over S Cle Elum RD & BNSF RR?

It is owned by the State Highway Agency.