Structure 13716A0000000 · King County, WA

NE 124th ST over Ramp/120th AVE

Carries NE 124th ST over Ramp/120th AVE, 5.5 N Jct SR 520.

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
CAR · 15 FT36 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

36 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.

Built1990rebuilt 2005
Length36.1 ft11 m
Daily traffic35,856counted 2013
Last inspectedSeptember 2023every 48 months

Location

StateWashington
CountyKing
Location5.5 N Jct SR 520
CarriesNE 124th ST
CrossesRamp/120th AVE
Coordinates47.70942, -122.18017

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length36.1 ft (11 m)
Max Span30.8 ft (9.4 m)
Deck Width115.2 ft (35.1 m)
Deck Area386.1 sq m
Main Spans1
Year Built1990 (reconstructed 2005)

Traffic

Avg Daily Traffic35,856 (2013)
Truck Traffic5%
Lanes On Bridge6
Lanes Under Bridge1

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number0013716A0000000

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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