Structure 5872B0000000 · Kittitas County, WA

I-90 over Yakima River

Carries I-90 over Yakima River, 16.5 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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT317 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 7/9Substructure 7/9

317 ft end to end, longest span 90 ft: about 4 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 1976
Length316.9 ft96.6 m
Daily traffic16,667counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateWashington
CountyKittitas
Location16.5 E Jct SR 906
CarriesI-90
CrossesYakima River
Coordinates47.23959, -121.17708

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length316.9 ft (96.6 m)
Max Span89.9 ft (27.4 m)
Deck Width42.3 ft (12.9 m)
Deck Area1246.1 sq m
Main Spans4
Year Built1959 (reconstructed 1976)

Traffic

Avg Daily Traffic16,667 (2023)
Truck Traffic23%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number0005872B0000000

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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