US Bridges

Llewellyn RD over Oflow Channel

Fair

Benton County, Oregon · 0272 MI W of HWY 99-W · Structure no. 18865 000 00270

Built
2001
24 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
70 ft
2 main spans
Daily traffic
437
2020 count
Owner
County
County Highway Agency

About this bridge

Llewellyn RD over Oflow Channel is a prestressed concrete slab carrying Llewellyn RD over Oflow Channel in Benton County, Oregon. It was built in 2001, so it is 24 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 5 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 437 vehicles a day, roughly 15% of them trucks, projected to reach 1,147 by 2040. The structure is 70 ft (21.2 m) long and 36 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLlewellyn RD
CrossesOflow Channel
Location0272 MI W of HWY 99-W
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.47573, -123.32783
Functional classRural Major 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 25 or greater
Structure length70 ft (21.2 m)
Longest span35 ft (10.6 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic437 (2020)
Projected traffic1,147 by 2040
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed8.7 mi (14 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 Llewellyn RD over Oflow Channel built?

It was built in 2001, making it 24 years old in 2025.

What condition is Llewellyn RD over Oflow Channel 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 Llewellyn RD over Oflow Channel carry?

About 437 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Llewellyn RD over Oflow Channel?

The structure is 70 ft (21.2 m) long with a longest span of 35 ft (10.6 m) and a deck 36 ft wide.

Who owns Llewellyn RD over Oflow Channel?

It is owned by the County Highway Agency.