Structure QE0000000 · Snohomish County, WA

SR 104 over Puget Sound @ Edmonds

Carries SR 104 over Puget Sound @ Edmonds, 0.1 W Jct SR 524.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT210 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

210 ft end to end, longest span 19 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 multi-beam bridge.

Built1953rebuilt 1995
Length210.0 ft64 m
Daily traffic5,870counted 2010
Last inspectedSeptember 2024every 12 months

Location

StateWashington
CountySnohomish
Location0.1 W Jct SR 524
CarriesSR 104
CrossesPuget Sound @ Edmonds
Coordinates47.81306, -122.38423

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length210.0 ft (64 m)
Max Span19.0 ft (5.8 m)
Deck Width50.9 ft (15.5 m)
Deck Area992 sq m
Main Spans11
Year Built1953 (reconstructed 1995)

Traffic

Avg Daily Traffic5,870 (2010)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000QE0000000

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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