Structure 20296 069 00014 · Washington County, OR

Vernonia RD over Nehalem River

Carries Vernonia RD over Nehalem River, 002 Mi N Sunset HWY.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating6/9 · Satisfactory
Substructure8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT115 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 6/9 · sets the ratingSubstructure 8/9

115 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 box-beam bridge.

Built200620 years old
Length115.2 ft35.1 m
Daily traffic367counted 2020
Last inspectedJuly 2024every 24 months

Location

StateOregon
CountyWashington
Location002 Mi N Sunset HWY
CarriesVernonia RD
CrossesNehalem River
Coordinates45.76038, -123.29807

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length115.2 ft (35.1 m)
Max Span109.9 ft (33.5 m)
Deck Width40.0 ft (12.2 m)
Deck Area428.2 sq m
Main Spans1
Year Built2006

Traffic

Avg Daily Traffic367 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number20296 069 00014

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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