Structure 80802000000000 · Snohomish County, WA

Sauk Prairie RD over Dan Creek

Carries Sauk Prairie RD over Dan Creek, 2.9 NE Jct SR 530.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT95 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

95 ft end to end, longest span 36 ft. 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 slab bridge.

Built197155 years old
Length95.1 ft29 m
Daily traffic574counted 2021
Last inspectedSeptember 2024every 24 months

Location

StateWashington
CountySnohomish
Location2.9 NE Jct SR 530
CarriesSauk Prairie RD
CrossesDan Creek
Coordinates48.27496, -121.55378

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length95.1 ft (29 m)
Max Span36.1 ft (11 m)
Deck Width29.2 ft (8.9 m)
Deck Area258.1 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic574 (2021)
Truck Traffic18%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number080802000000000

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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