US Bridges

SW 30th ST over Oak Creek

Fair

Benton County, Oregon · Oregon State University · Structure no. 20760 000 00000

Built
1958
67 years old, rebuilt 2006
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
50 ft
3 main spans
Daily traffic
5,930
2010 count
Owner
State
Other State Agency

About this bridge

SW 30th ST over Oak Creek is a wood or timber stringer/multi-beam or girder carrying SW 30th ST over Oak Creek in Benton County, Oregon. It was built in 1958 and reconstructed in 2006, so it is 67 years old, older 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 5,930 vehicles a day, roughly 10% of them trucks, projected to reach 7,957 by 2030. The structure is 50 ft (15.2 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSW 30th ST
CrossesOak Creek
LocationOregon State University
RouteCity Street 0
StateOregon
Coordinates44.55869, -123.2846
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 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 rating38.9 US tons
Inventory rating30 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 15
Structure length50 ft (15.2 m)
Longest span50 ft (15.2 m)
Deck width46 ft (14 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,930 (2010)
Projected traffic7,957 by 2030
Trucks10%
Lanes on structure2
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

OwnerOther State Agency
Maintained byOther State 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 30th ST over Oak Creek built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2006.

What condition is SW 30th ST over Oak 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 June 2024.

How much traffic does SW 30th ST over Oak Creek carry?

About 5,930 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is SW 30th ST over Oak Creek?

The structure is 50 ft (15.2 m) long with a longest span of 50 ft (15.2 m) and a deck 46 ft wide.

Who owns SW 30th ST over Oak Creek?

It is owned by the Other State Agency.