Structure 85358000000000 · King County, WA

Airport Way S over Argo Rr Yard

Carries Airport Way S over Argo Rr Yard, 5200 Airport Way S.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT956 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

956 ft end to end, longest span 107 ft: about 2.7 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 girder bridge.

Built1928rebuilt 2012
Length956.0 ft291.4 m
Daily traffic17,500counted 2021
Last inspectedJuly 2023every 24 months

Location

StateWashington
CountyKing
Location5200 Airport Way S
CarriesAirport Way S
CrossesArgo Rr Yard
Coordinates47.55528, -122.32222

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length956.0 ft (291.4 m)
Max Span107.0 ft (32.6 m)
Deck Width59.1 ft (18 m)
Deck Area5245.2 sq m
Main Spans13
Year Built1928 (reconstructed 2012)

Traffic

Avg Daily Traffic17,500 (2021)
Truck Traffic20%
Lanes On Bridge4

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number085358000000000

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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