Structure 7741R0000000 · King County, WA

Spokane ST WB Lane over I-5

Carries Spokane ST WB Lane over I-5, 5.5 N Jct SR 900.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,885 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 7/9

2,885 ft end to end, longest span 115 ft: about 8.0 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built196759 years old
Length2884.8 ft879.3 m
Daily traffic13,457counted 2012
Last inspectedSeptember 2024every 24 months

Location

StateWashington
CountyKing
Location5.5 N Jct SR 900
CarriesSpokane ST WB Lane
CrossesI-5
Coordinates47.57322, -122.31594

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length2884.8 ft (879.3 m)
Max Span115.5 ft (35.2 m)
Deck Width32.5 ft (9.9 m)
Deck Area8705.1 sq m
Main Spans34
Year Built1967

Traffic

Avg Daily Traffic13,457 (2012)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge24

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0007741R0000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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