Structure 82645000000000 · King County, WA

16th AVE S over Mcsorely Creek

Carries 16th AVE S over Mcsorely Creek, 1.5 Mi N Of Hw-99.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT375 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

375 ft end to end, longest span 125 ft: 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 box-beam bridge.

Built1951rebuilt 1996
Length375.0 ft114.3 m
Daily traffic10,000counted 2014
Last inspectedAugust 2024every 24 months

Location

StateWashington
CountyKing
Location1.5 Mi N Of Hw-99
Carries16th AVE S
CrossesMcsorely Creek
Coordinates47.37503, -122.31312

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Single/Spread
Total Length375.0 ft (114.3 m)
Max Span125.0 ft (38.1 m)
Deck Width31.5 ft (9.6 m)
Deck Area1097.3 sq m
Main Spans3
Year Built1951 (reconstructed 1996)

Traffic

Avg Daily Traffic10,000 (2014)
Truck Traffic10%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical9 — Foundation above flood level
Structure Number082645000000000

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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