Structure 7299C0000000 · King County, WA

NE 185th ST over I-5

Carries NE 185th ST over I-5, 2.1 N Jct SR 523.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT249 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

249 ft end to end, longest span 75 ft: about 3 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.

Built196462 years old
Length249.0 ft75.9 m
Daily traffic9,704counted 2010
Last inspectedJune 2023every 24 months

Location

StateWashington
CountyKing
Location2.1 N Jct SR 523
CarriesNE 185th ST
CrossesI-5
Coordinates47.76325, -122.32431

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length249.0 ft (75.9 m)
Max Span75.1 ft (22.9 m)
Deck Width60.0 ft (18.3 m)
Deck Area1389.0 sq m
Main Spans4
Year Built1964

Traffic

Avg Daily Traffic9,704 (2010)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge9

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0007299C0000000

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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