US Bridges

Walnut Blvd over Oak Creek

GoodPosted for load

Benton County, Oregon · 00.83 MI W of Corvallis · Structure no. 14445 000 00140

Built
1968
57 years old, rebuilt 1978
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
10,715
2020 count
Owner
County
County Highway Agency

About this bridge

Walnut Blvd over Oak Creek is a prestressed concrete box beam or girders - multiple carrying Walnut Blvd over Oak Creek in Benton County, Oregon. It was built in 1968 and reconstructed in 1978, so it is 57 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 10,715 vehicles a day, roughly 10% of them trucks, projected to reach 15,299 by 2040. The structure is 60 ft (18.3 m) long and 56 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesWalnut Blvd
CrossesOak Creek
Location00.83 MI W of Corvallis
RouteCounty Highway 0
StateOregon
Coordinates44.57139, -123.31213
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating22.3 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span59 ft (18 m)
Deck width56 ft (17.1 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,715 (2020)
Projected traffic15,299 by 2040
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Walnut Blvd over Oak Creek built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1978.

What condition is Walnut Blvd over Oak Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Walnut Blvd over Oak Creek carry?

About 10,715 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Walnut Blvd over Oak Creek?

The structure is 60 ft (18.3 m) long with a longest span of 59 ft (18 m) and a deck 56 ft wide.

Who owns Walnut Blvd over Oak Creek?

It is owned by the County Highway Agency.