US Bridges

NW 9th ST over Dixon CR

Fair

Benton County, Oregon · 002 MI S of Buchanan Ave · Structure no. 07T15A000 00084

Built
1985
40 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
20,182
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW 9th ST over Dixon CR is a prestressed concrete slab carrying NW 9th ST over Dixon CR in Benton County, Oregon. It was built in 1985, so it is 40 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 20,182 vehicles a day, roughly 10% of them trucks, projected to reach 29,175 by 2040. The structure is 33 ft (10.1 m) long and 78 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNW 9th ST
CrossesDixon CR
Location002 MI S of Buchanan Ave
RouteCity Street 0
CountyBenton County
StateOregon
Coordinates44.57338, -123.26341
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating51 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span32 ft (9.8 m)
Deck width78 ft (23.8 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,182 (2020)
Projected traffic29,175 by 2040
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 9th ST over Dixon CR built?

It was built in 1985, making it 40 years old in 2025.

What condition is NW 9th ST over Dixon CR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does NW 9th ST over Dixon CR carry?

About 20,182 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is NW 9th ST over Dixon CR?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 78 ft wide.

Who owns NW 9th ST over Dixon CR?

It is owned by the City or Municipal Highway Agency.