Structure 14601D0000000 · Adams County, WA

I-90 over US 395 SB

Carries I-90 over US 395 SB, 13.6 E Jct SR 21.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT139 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 8/9

139 ft end to end. 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.

Built199630 years old
Length139.1 ft42.4 m
Daily traffic5,868counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateWashington
CountyAdams
Location13.6 E Jct SR 21
CarriesI-90
CrossesUS 395 SB
Coordinates47.11150, -118.38889

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length139.1 ft (42.4 m)
Max Span132.9 ft (40.5 m)
Deck Width39.7 ft (12.1 m)
Deck Area513.0 sq m
Main Spans1
Year Built1996

Traffic

Avg Daily Traffic5,868 (2023)
Truck Traffic26%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number0014601D0000000

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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