US Bridges

SW 35th ST over Dunawi Creek

Fair

Benton County, Oregon · N of Knollbrook Ave · Structure no. 07T23A000 00129

Built
1977
48 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
5,410
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

SW 35th ST over Dunawi Creek is a prestressed concrete slab carrying SW 35th ST over Dunawi Creek in Benton County, Oregon. It was built in 1977, so it is 48 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 5,410 vehicles a day, roughly 10% of them trucks, projected to reach 7,745 by 2040. The structure is 26 ft (7.9 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSW 35th ST
CrossesDunawi Creek
LocationN of Knollbrook Ave
RouteCity Street 0
CountyBenton County
StateOregon
Coordinates44.54974, -123.28962
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating53.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width50 ft (15.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,410 (2020)
Projected traffic7,745 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 SW 35th ST over Dunawi Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is SW 35th ST over Dunawi Creek 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 SW 35th ST over Dunawi Creek carry?

About 5,410 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is SW 35th ST over Dunawi Creek?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 50 ft wide.

Who owns SW 35th ST over Dunawi Creek?

It is owned by the City or Municipal Highway Agency.