Structure 47C79 921 · Marion County, OR

Vaughn RD over Doty Creek

Carries Vaughn RD over Doty Creek, 028m SE Ankeny Hl I-5 Jct.

Overall conditionPoor

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 4/9 · sets the rating

31 ft end to end, longest span 16 ft. 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 slab bridge.

Built197353 years old
Length30.8 ft9.4 m
Daily traffic43counted 2020
Last inspectedAugust 2024every 24 months

Location

StateOregon
CountyMarion
Location028m SE Ankeny Hl I-5 Jct
CarriesVaughn RD
CrossesDoty Creek
Coordinates44.75747, -122.99476

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length30.8 ft (9.4 m)
Max Span16.1 ft (4.9 m)
Deck Width25.6 ft (7.8 m)
Deck Area73.3 sq m
Main Spans2
Year Built1973

Traffic

Avg Daily Traffic43 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number47C79 921

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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