Structure 2003690000000 · Snohomish County, WA

Alderwood Mall Blv over City Maint Storage

Carries Alderwood Mall Blv over City Maint Storage, 1.6 E Jct SR 99.

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 FT92 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

92 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.

Built200125 years old
Length91.9 ft28 m
Daily traffic19,198counted 2004
Last inspectedJuly 2022every 48 months

Location

StateWashington
CountySnohomish
Location1.6 E Jct SR 99
CarriesAlderwood Mall Blv
CrossesCity Maint Storage
Coordinates47.82131, -122.28022

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length91.9 ft (28 m)
Max Span91.9 ft (28 m)
Deck Width61.4 ft (18.7 m)
Deck Area523.6 sq m
Main Spans1
Year Built2001

Traffic

Avg Daily Traffic19,198 (2004)
Lanes On Bridge4

Inspection & Ownership

Last InspectionJuly 2022
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number002003690000000

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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