US Bridges

I-90 over Garden Springs RD

Fair

Spokane County, Washington · 4.7 E JCT SR 902 · Structure no. 0006875C0000000

Built
1962
63 years old, rebuilt 1993
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
150 ft
3 main spans
Daily traffic
25,537
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Garden Springs RD is a prestressed concrete stringer/multi-beam or girder carrying I-90 over Garden Springs RD in Spokane County, Washington. It was built in 1962 and reconstructed in 1993, so it is 63 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 25,537 vehicles a day, roughly 16% of them trucks, projected to reach 31,170 by 2039. The structure is 150 ft (45.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesGarden Springs RD
Location4.7 E JCT SR 902
RouteInterstate 90
CountySpokane County
StateWashington
Coordinates47.63125, -117.48364
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span49 ft (14.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,537 (2023)
Projected traffic31,170 by 2039
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 over Garden Springs RD built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1993.

What condition is I-90 over Garden Springs RD 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 2023.

How much traffic does I-90 over Garden Springs RD carry?

About 25,537 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-90 over Garden Springs RD?

The structure is 150 ft (45.7 m) long with a longest span of 49 ft (14.8 m) and a deck 43 ft wide.

Who owns I-90 over Garden Springs RD?

It is owned by the State Highway Agency.