Structure 5203A0000000 · Kittitas County, WA

I-90 over Coal Creek

Carries I-90 over Coal Creek, 0.5 E Jct SR 906.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT57 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 7/9Substructure 7/9

57 ft end to end. Lengths and the car 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 rigid-frame bridge.

Built1956rebuilt 1972
Length57.1 ft17.4 m
Daily traffic18,069counted 2023
Last inspectedJuly 2023every 24 months

Location

StateWashington
CountyKittitas
Location0.5 E Jct SR 906
CarriesI-90
CrossesCoal Creek
Coordinates47.39319, -121.38947

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length57.1 ft (17.4 m)
Max Span54.1 ft (16.5 m)
Deck Width54.5 ft (16.6 m)
Deck Area288.8 sq m
Main Spans1
Year Built1956 (reconstructed 1972)

Traffic

Avg Daily Traffic18,069 (2023)
Truck Traffic21%
Lanes On Bridge3

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number0005203A0000000

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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