Structure 22688 483 04675 · Yamhill County, OR

Or 18-hwy 483 over South Yamhill River

Carries Or 18-hwy 483 over South Yamhill River, 060 Mi SW HWY 1w Jct.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT970 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

970 ft end to end, longest span 250 ft: about 2.7 football fields. 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.

Built20233 years old
Length970.1 ft295.7 m
Daily traffic14,355counted 2022
Last inspectedNovember 2023every 24 months

Location

StateOregon
CountyYamhill
Location060 Mi SW HWY 1w Jct
CarriesOr 18-hwy 483
CrossesSouth Yamhill River
Coordinates45.20559, -123.18224

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length970.1 ft (295.7 m)
Max Span250.0 ft (76.2 m)
Deck Width49.2 ft (15 m)
Deck Area4435.5 sq m
Main Spans5
Year Built2023

Traffic

Avg Daily Traffic14,355 (2022)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number22688 483 04675

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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