US Bridges

Spokane ST EB Lane over I-5

Fair

King County, Washington · 5.5 N JCT SR 900 · Structure no. 0007741T0000000

Built
1966
59 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
1,793 ft
20 main spans
Daily traffic
28,260
2012 count
Owner
State
State Highway Agency

About this bridge

Spokane ST EB Lane over I-5 is a concrete continuous box beam or girders - multiple carrying Spokane ST EB Lane over I-5 in King 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 28,260 vehicles a day, roughly 5% of them trucks, projected to reach 45,216 by 2036. The structure is 1,793 ft (546.5 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSpokane ST EB Lane
CrossesI-5
Location5.5 N JCT SR 900
RouteCity Street 5
CountyKing County
StateWashington
Coordinates47.57147, -122.32617
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating38 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans20
Design loadHS 20
Structure length1,793 ft (546.5 m)
Longest span116 ft (35.4 m)
Deck width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,260 (2012)
Projected traffic45,216 by 2036
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed3.7 mi (6 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$27.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Spokane ST EB Lane over I-5 built?

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

What condition is Spokane ST EB Lane over I-5 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 Spokane ST EB Lane over I-5 carry?

About 28,260 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Spokane ST EB Lane over I-5?

The structure is 1,793 ft (546.5 m) long with a longest span of 116 ft (35.4 m) and a deck 32 ft wide.

Who owns Spokane ST EB Lane over I-5?

It is owned by the State Highway Agency.