Structure 470415000 00000 · Marion County, OR

13th ST East over Shelton Ditch

Carries 13th ST East over Shelton Ditch, Parallel To 470414.

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, longest span 76 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 tee-beam bridge.

Built197551 years old
Length110.9 ft33.8 m
Daily traffic19,501counted 2020
Last inspectedAugust 2023every 24 months

Location

StateOregon
CountyMarion
LocationParallel To 470414
Carries13th ST East
CrossesShelton Ditch
Coordinates44.93105, -123.02871

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length110.9 ft (33.8 m)
Max Span76.1 ft (23.2 m)
Deck Width37.4 ft (11.4 m)
Deck Area385.3 sq m
Main Spans3
Year Built1975

Traffic

Avg Daily Traffic19,501 (2020)
Truck Traffic10%
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical3 — Scour critical
Structure Number470415000 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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