Structure 89475000000000 · King County, WA

Parking Lot Road over Sound Transit Light Rail

Carries Parking Lot Road over Sound Transit Light Rail, W. Of Winters House.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

31 ft end to end. Lengths and the car 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 slab bridge.

Built20233 years old
Length31.5 ft9.6 m
Daily traffic100counted 2023
Last inspectedOctober 2023every 24 months

Location

StateWashington
CountyKing
LocationW. Of Winters House
CarriesParking Lot Road
CrossesSound Transit Light Rail
Coordinates47.59111, -122.19306

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length31.5 ft (9.6 m)
Max Span29.9 ft (9.1 m)
Deck Width76.1 ft (23.2 m)
Deck Area222.7 sq m
Main Spans1
Year Built2023

Traffic

Avg Daily Traffic100 (2023)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerRailroad
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number089475000000000

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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