Structure 4563A0000000 · Skagit County, WA

I-5 over SR 536 Kincaid ST

Carries I-5 over SR 536 Kincaid ST, 5.3 N Jct SR 534.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT146 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

146 ft end to end, longest span 63 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 tee-beam bridge.

Built1953rebuilt 1975
Length146.0 ft44.5 m
Daily traffic30,793counted 2023
Last inspectedMarch 2023every 24 months

Location

StateWashington
CountySkagit
Location5.3 N Jct SR 534
CarriesI-5
CrossesSR 536 Kincaid ST
Coordinates48.41731, -122.33292

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length146.0 ft (44.5 m)
Max Span63.0 ft (19.2 m)
Deck Width83.0 ft (25.3 m)
Deck Area1125.8 sq m
Main Spans3
Year Built1953 (reconstructed 1975)

Traffic

Avg Daily Traffic30,793 (2023)
Truck Traffic10%
Lanes On Bridge4
Lanes Under Bridge5

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0004563A0000000

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.

Nearby Bridges