Structure 79794000000000 · King County, WA

NE Index Ck RD over Skykomish River-s Fork

Carries NE Index Ck RD over Skykomish River-s Fork, 0.1 Mi S Of Sr-2.

Overall conditionPoor

Set by its lowest-rated component: Superstructure and Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating4/9 · Poor
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT340 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 4/9 · sets the ratingSubstructure 4/9 · sets the rating

340 ft end to end: about 5 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 suspension bridge.

Built1930rebuilt 1952
Length339.9 ft103.6 m
Daily traffic80counted 2022
Last inspectedAugust 2024every 12 months

Location

StateWashington
CountyKing
Location0.1 Mi S Of Sr-2
CarriesNE Index Ck RD
CrossesSkykomish River-s Fork
Coordinates47.76531, -121.48050

Physical Characteristics

MaterialWood or Timber
DesignSuspension
Total Length339.9 ft (103.6 m)
Max Span272.0 ft (82.9 m)
Deck Width10.5 ft (3.2 m)
Deck Area331.5 sq m
Main Spans1
Year Built1930 (reconstructed 1952)

Traffic

Avg Daily Traffic80 (2022)
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical3 — Scour critical
Structure Number079794000000000

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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