Structure 18811C0000000 · King County, WA

SR 167 Flyover over I-405 NB SR 167 NB

Carries SR 167 Flyover over I-405 NB SR 167 NB, Jct I-405 & SR 167.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,846 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

1,846 ft end to end, longest span 174 ft: about 5.1 football fields. 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 multi-beam bridge.

Built20188 years old
Length1846.1 ft562.7 m
Daily traffic5,000counted 2019
Last inspectedFebruary 2023every 24 months

Location

StateWashington
CountyKing
LocationJct I-405 & SR 167
CarriesSR 167 Flyover
CrossesI-405 NB SR 167 NB
Coordinates47.46492, -122.21803

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1846.1 ft (562.7 m)
Max Span173.9 ft (53 m)
Deck Width58.1 ft (17.7 m)
Deck Area9959.8 sq m
Main Spans11
Year Built2018

Traffic

Avg Daily Traffic5,000 (2019)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge7

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number0018811C0000000

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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