Structure 87408000000000 · Snohomish County, WA

84th ST NE over Little Pilchuck Creek

Carries 84th ST NE over Little Pilchuck Creek, 1.1 W Jct SR 92.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT34 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

34 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 multi-beam bridge.

Built200620 years old
Length33.8 ft10.3 m
Daily traffic10,540counted 2022
Last inspectedJuly 2023every 24 months

Location

StateWashington
CountySnohomish
Location1.1 W Jct SR 92
Carries84th ST NE
CrossesLittle Pilchuck Creek
Coordinates48.07235, -122.02908

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length33.8 ft (10.3 m)
Max Span27.6 ft (8.4 m)
Deck Width31.5 ft (9.6 m)
Deck Area98.9 sq m
Main Spans1
Year Built2006

Traffic

Avg Daily Traffic10,540 (2022)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number087408000000000

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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