Structure 7565N0000000 · King County, WA

I-5 over Sdot Maintenance Yard

Carries I-5 over Sdot Maintenance Yard, Jct I-90.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT459 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

459 ft end to end, longest span 80 ft: about 6 semi-trucks nose to tail. 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.

Built1966rebuilt 1991
Length459.0 ft139.9 m
Daily traffic2,510counted 2012
Last inspectedApril 2023every 48 months

Location

StateWashington
CountyKing
LocationJct I-90
CarriesI-5
CrossesSdot Maintenance Yard
Coordinates47.59456, -122.32114

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length459.0 ft (139.9 m)
Max Span80.1 ft (24.4 m)
Deck Width26.9 ft (8.2 m)
Deck Area1147.2 sq m
Main Spans6
Year Built1966 (reconstructed 1991)

Traffic

Avg Daily Traffic2,510 (2012)
Truck Traffic5%
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number0007565N0000000

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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