Structure 12621 074000094 · Linn County, OR

Cochran CR DR over Cochran CR

Carries Cochran CR DR over Cochran CR, 009 Mi E CR 425.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT30 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

30 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 slab bridge.

Built196363 years old
Length29.9 ft9.1 m
Daily traffic82counted 2021
Last inspectedOctober 2024every 24 months

Location

StateOregon
CountyLinn
Location009 Mi E CR 425
CarriesCochran CR DR
CrossesCochran CR
Coordinates44.42828, -122.97158

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length29.9 ft (9.1 m)
Max Span28.9 ft (8.8 m)
Deck Width24.0 ft (7.3 m)
Deck Area66.4 sq m
Main Spans1
Year Built1963

Traffic

Avg Daily Traffic82 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number12621 074000094

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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