Structure 89208000000000 · Snohomish County, WA

55th AVE NE over Kackman Creek

Carries 55th AVE NE over Kackman Creek, 4.2 E Jct I-5.

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
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT119 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

119 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.

Built20215 years old
Length118.8 ft36.2 m
Daily traffic200counted 2021
Last inspectedJuly 2023every 24 months

Location

StateWashington
CountySnohomish
Location4.2 E Jct I-5
Carries55th AVE NE
CrossesKackman Creek
Coordinates48.21725, -122.15575

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length118.8 ft (36.2 m)
Max Span109.9 ft (33.5 m)
Deck Width33.8 ft (10.3 m)
Deck Area372.9 sq m
Main Spans1
Year Built2021

Traffic

Avg Daily Traffic200 (2021)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number089208000000000

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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