Structure 7110J0000000 · King County, WA

Spring ST Ramp over I-5 SB Col

Carries Spring ST Ramp over I-5 SB Col, 1.1 N Jct I-90.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT170 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

170 ft end to end, longest span 67 ft: about 2 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 slab bridge.

Built196462 years old
Length169.9 ft51.8 m
Daily traffic14,032counted 2012
Last inspectedNovember 2023every 24 months

Location

StateWashington
CountyKing
Location1.1 N Jct I-90
CarriesSpring ST Ramp
CrossesI-5 SB Col
Coordinates47.60767, -122.33119

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length169.9 ft (51.8 m)
Max Span66.9 ft (20.4 m)
Deck Width28.5 ft (8.7 m)
Deck Area450.7 sq m
Main Spans3
Year Built1964

Traffic

Avg Daily Traffic14,032 (2012)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0007110J0000000

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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