Structure 47C32 504 00000 · Marion County, OR

Matheny RD over Overflow Channel

Carries Matheny RD over Overflow Channel, 00.3 East Of Ferry.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT109 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

109 ft end to end, longest span 18 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
Length108.9 ft33.2 m
Daily traffic1,523counted 2020
Last inspectedAugust 2024every 24 months

Location

StateOregon
CountyMarion
Location00.3 East Of Ferry
CarriesMatheny RD
CrossesOverflow Channel
Coordinates45.08983, -123.03973

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length108.9 ft (33.2 m)
Max Span18.0 ft (5.5 m)
Deck Width24.9 ft (7.6 m)
Deck Area252.3 sq m
Main Spans6
Year Built1973

Traffic

Avg Daily Traffic1,523 (2020)
Truck Traffic8%
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 Number47C32 504 00000

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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