Structure 83886000000000 · King County, WA

NE Old Cascade HWY over Tye River

Carries NE Old Cascade HWY over Tye River, 0.1 Mi S Of Sr-2.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT61 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

61 ft end to end. 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 multi-beam bridge.

Built196066 years old
Length61.0 ft18.6 m
Daily traffic40counted 2023
Last inspectedJuly 2023every 24 months

Location

StateWashington
CountyKing
Location0.1 Mi S Of Sr-2
CarriesNE Old Cascade HWY
CrossesTye River
Coordinates47.71131, -121.15298

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length61.0 ft (18.6 m)
Max Span60.0 ft (18.3 m)
Deck Width21.0 ft (6.4 m)
Deck Area119.0 sq m
Main Spans1
Year Built1960

Traffic

Avg Daily Traffic40 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical7 — Countermeasures installed
Structure Number083886000000000

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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