Structure 22339 047 06338 · Washington County, OR

US 26 (hwy 047) over Rock Creek

Carries US 26 (hwy 047) over Rock Creek, 11.1 Mi W Of Portland Cc.

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
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

111 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 multi-beam bridge.

Built20179 years old
Length110.9 ft33.8 m
Daily traffic110,950counted 2022
Last inspectedOctober 2024every 24 months

Location

StateOregon
CountyWashington
Location11.1 Mi W Of Portland Cc
CarriesUS 26 (hwy 047)
CrossesRock Creek
Coordinates45.54815, -122.88384

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length110.9 ft (33.8 m)
Max Span103.0 ft (31.4 m)
Deck Width125.3 ft (38.2 m)
Deck Area1291.2 sq m
Main Spans1
Year Built2017

Traffic

Avg Daily Traffic110,950 (2022)
Truck Traffic3%
Lanes On Bridge6

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number22339 047 06338

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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