Structure 7T10 000 00030 · Benton County, OR

NW Grant ST over Dixon CR

Carries NW Grant ST over Dixon CR, E Of NW 17th ST.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating3/9 · Serious
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 3/9 · sets the rating

24 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built196759 years old
Length24.0 ft7.3 m
Daily traffic4,100counted 2020
Last inspectedJuly 2024every 24 months

Location

StateOregon
CountyBenton
LocationE Of NW 17th ST
CarriesNW Grant ST
CrossesDixon CR
Coordinates44.57957, -123.26981

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length24.0 ft (7.3 m)
Max Span23.0 ft (7 m)
Deck Width48.6 ft (14.8 m)
Deck Area108.0 sq m
Main Spans1
Year Built1967

Traffic

Avg Daily Traffic4,100 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number07T10 000 00030

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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