Structure 8176B0000000 · Snohomish County, WA

SR 204 over Ebey Slough

Carries SR 204 over Ebey Slough, Jct US 2.

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT202 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

202 ft end to end, longest span 42 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 slab bridge.

Built196759 years old
Length202.1 ft61.6 m
Daily traffic14,511counted 2023
Last inspectedAugust 2024every 24 months

Location

StateWashington
CountySnohomish
LocationJct US 2
CarriesSR 204
CrossesEbey Slough
Coordinates47.97894, -122.13794

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length202.1 ft (61.6 m)
Max Span42.0 ft (12.8 m)
Deck Width27.9 ft (8.5 m)
Deck Area523.6 sq m
Main Spans5
Year Built1967

Traffic

Avg Daily Traffic14,511 (2023)
Truck Traffic5%
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number0008176B0000000

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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