Structure 6124B0000000 · King County, WA

I-5 over Military RD

Carries I-5 over Military RD, 2.6 N Jct SR 18.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT199 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

199 ft end to end, longest span 78 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 box-beam bridge.

Built1959rebuilt 2002
Length199.1 ft60.7 m
Daily traffic98,173counted 2023
Last inspectedFebruary 2024every 24 months

Location

StateWashington
CountyKing
Location2.6 N Jct SR 18
CarriesI-5
CrossesMilitary RD
Coordinates47.32701, -122.29437

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length199.1 ft (60.7 m)
Max Span78.1 ft (23.8 m)
Deck Width80.4 ft (24.5 m)
Deck Area1487.2 sq m
Main Spans3
Year Built1959 (reconstructed 2002)

Traffic

Avg Daily Traffic98,173 (2023)
Truck Traffic7%
Lanes On Bridge5
Lanes Under Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0006124B0000000

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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