Structure 2306 201 00097 · Benton County, OR

HWY 201 over S. Fork Alsea Overflow

Carries HWY 201 over S. Fork Alsea Overflow, 010 Mi S HWY 27 Jct.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT60 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

60 ft end to end, longest span 12 ft. 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.

Built193789 years old
Length60.0 ft18.3 m
Daily traffic342counted 2022
Last inspectedJanuary 2024every 24 months

Location

StateOregon
CountyBenton
Location010 Mi S HWY 27 Jct
CarriesHWY 201
CrossesS. Fork Alsea Overflow
Coordinates44.36782, -123.59891

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length60.0 ft (18.3 m)
Max Span12.1 ft (3.7 m)
Deck Width28.9 ft (8.8 m)
Deck Area161.0 sq m
Main Spans5
Year Built1937

Traffic

Avg Daily Traffic342 (2022)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number02306 201 00097

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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