Structure 7967C0000000 · King County, WA

S-s Ramp over S 116th Way

Carries S-s Ramp over S 116th Way, Jct SR 99.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT196 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

196 ft end to end, longest span 83 ft: about 3 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 multi-beam bridge.

Built196660 years old
Length195.9 ft59.7 m
Daily traffic1,028counted 2023
Last inspectedMay 2024every 24 months

Location

StateWashington
CountyKing
LocationJct SR 99
CarriesS-s Ramp
CrossesS 116th Way
Coordinates47.49789, -122.29589

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length195.9 ft (59.7 m)
Max Span83.0 ft (25.3 m)
Deck Width26.2 ft (8 m)
Deck Area477.6 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic1,028 (2023)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0007967C0000000

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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