Structure 1327A307401786 · Columbia County, OR

Timber Road over E Fk Nehalem River

Carries Timber Road over E Fk Nehalem River, 026 Mi SW HWY 47 Jct.

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
SEMI-TRUCK · 72 FT194 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

194 ft end to end, longest span 98 ft: about 3 semi-trucks nose to tail. 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 box-beam bridge.

Built196660 years old
Length193.9 ft59.1 m
Daily traffic338counted 2020
Last inspectedMay 2023every 24 months

Location

StateOregon
CountyColumbia
Location026 Mi SW HWY 47 Jct
CarriesTimber Road
CrossesE Fk Nehalem River
Coordinates45.83302, -123.25327

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Single/Spread
Total Length193.9 ft (59.1 m)
Max Span98.1 ft (29.9 m)
Deck Width34.4 ft (10.5 m)
Deck Area620.5 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic338 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number01327A307401786

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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