Structure 85694000000000 · King County, WA

Avondale Road over Bear Creek

Carries Avondale Road over Bear Creek, .4 N Jct 520/202.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

52 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 channel-beam bridge.

Built1979rebuilt 1988
Length51.8 ft15.8 m
Daily traffic34,500counted 2020
Last inspectedMay 2023every 24 months

Location

StateWashington
CountyKing
Location.4 N Jct 520/202
CarriesAvondale Road
CrossesBear Creek
Coordinates47.67583, -122.10600

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length51.8 ft (15.8 m)
Max Span49.9 ft (15.2 m)
Deck Width71.9 ft (21.9 m)
Deck Area346.0 sq m
Main Spans1
Year Built1979 (reconstructed 1988)

Traffic

Avg Daily Traffic34,500 (2020)
Truck Traffic7%
Lanes On Bridge5

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number085694000000000

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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