Structure 11629 000 · Yamhill County, OR

Patty Lane over Ash Swale

Carries Patty Lane over Ash Swale, 020 Mi S Of Amity.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT127 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

127 ft end to end, longest span 20 ft. Lengths and the semi-truck 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.

Built1958rebuilt 1970
Length127.0 ft38.7 m
Daily traffic129counted 2020
Last inspectedSeptember 2024every 12 months

Location

StateOregon
CountyYamhill
Location020 Mi S Of Amity
CarriesPatty Lane
CrossesAsh Swale
Coordinates45.08642, -123.20062

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length127.0 ft (38.7 m)
Max Span20.0 ft (6.1 m)
Deck Width20.3 ft (6.2 m)
Deck Area239.9 sq m
Main Spans6
Year Built1958 (reconstructed 1970)

Traffic

Avg Daily Traffic129 (2020)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number11629 000

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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