Structure 60506000001290 · Snohomish County, WA

Road over N Fk Skykomish River

Carries Road over N Fk Skykomish River, 0.1 Mi N Of 63/6335 Jct.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT200 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

200 ft end to end, longest span 80 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 box-beam bridge.

Built1963rebuilt 2010
Length200.1 ft61 m
Daily traffic10counted 1995
Last inspectedJune 2023every 24 months

Location

StateWashington
CountySnohomish
Location0.1 Mi N Of 63/6335 Jct
CarriesRoad
CrossesN Fk Skykomish River
Coordinates47.89169, -121.44169

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length200.1 ft (61 m)
Max Span80.1 ft (24.4 m)
Deck Width18.4 ft (5.6 m)
Deck Area341.6 sq m
Main Spans4
Year Built1963 (reconstructed 2010)

Traffic

Avg Daily Traffic10 (1995)
Lanes On Bridge1

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical4 — Foundations need monitoring
Structure Number060506000001290

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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