Structure 6911D0000000 · King County, WA

SR 522 over W-s Ramp I-5

Carries SR 522 over W-s Ramp I-5, 0.1 E Jct I-5.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT358 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

358 ft end to end, longest span 93 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.

Built196264 years old
Length357.9 ft109.1 m
Daily traffic14,052counted 2023
Last inspectedApril 2023every 24 months

Location

StateWashington
CountyKing
Location0.1 E Jct I-5
CarriesSR 522
CrossesW-s Ramp I-5
Coordinates47.68206, -122.32042

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length357.9 ft (109.1 m)
Max Span92.8 ft (28.3 m)
Deck Width26.6 ft (8.1 m)
Deck Area883.7 sq m
Main Spans5
Year Built1962

Traffic

Avg Daily Traffic14,052 (2023)
Truck Traffic2%
Lanes On Bridge1
Lanes Under Bridge10

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0006911D0000000

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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