Structure 4795A0000000 · Skagit County, WA

I-5 over SR 538

Carries I-5 over SR 538, 1.3 N Jct SR 536.

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 FT124 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

124 ft end to end, longest span 55 ft. 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 tee-beam bridge.

Built1955rebuilt 1974
Length124.0 ft37.8 m
Daily traffic32,095counted 2023
Last inspectedMay 2024every 24 months

Location

StateWashington
CountySkagit
Location1.3 N Jct SR 536
CarriesI-5
CrossesSR 538
Coordinates48.43572, -122.34108

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length124.0 ft (37.8 m)
Max Span55.1 ft (16.8 m)
Deck Width83.7 ft (25.5 m)
Deck Area963.9 sq m
Main Spans3
Year Built1955 (reconstructed 1974)

Traffic

Avg Daily Traffic32,095 (2023)
Truck Traffic10%
Lanes On Bridge4
Lanes Under Bridge6

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 Number0004795A0000000

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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