Structure 85175000000000 · King County, WA

15th AVE NW over NW Leary Way

Carries 15th AVE NW over NW Leary Way, 15th AVE NW & NW Leary Wy.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT349 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

349 ft end to end, longest span 70 ft: about 5 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 multi-beam bridge.

Built195868 years old
Length349.1 ft106.4 m
Daily traffic60,000counted 2020
Last inspectedJune 2023every 24 months

Location

StateWashington
CountyKing
Location15th AVE NW & NW Leary Wy
Carries15th AVE NW
CrossesNW Leary Way
Coordinates47.66367, -122.37625

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length349.1 ft (106.4 m)
Max Span69.9 ft (21.3 m)
Deck Width48.6 ft (14.8 m)
Deck Area1574.7 sq m
Main Spans5
Year Built1958

Traffic

Avg Daily Traffic60,000 (2020)
Truck Traffic5%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number085175000000000

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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