US Bridges

US 20 (hwy 33) over Marys River & Wprr

FairPosted for load

Benton County, Oregon · 052 MI E Lincoln-Benton · Structure no. 00866B033 03934

Built
1955
70 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
297 ft
6 main spans
Daily traffic
7,008
2022 count
Owner
State
State Highway Agency

About this bridge

US 20 (hwy 33) over Marys River & Wprr is a concrete continuous tee beam carrying US 20 (hwy 33) over Marys River & Wprr in Benton County, Oregon. It was built in 1955, so it is 70 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. Its operating status is: posted for other load-capacity restriction.

It carries about 7,008 vehicles a day, roughly 15% of them trucks, projected to reach 7,900 by 2042. The structure is 297 ft (90.5 m) long and 34 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesUS 20 (hwy 33)
CrossesMarys River & Wprr
Location052 MI E Lincoln-Benton
RouteU.S. Route 20
CountyBenton County
StateOregon
Coordinates44.59658, -123.52046
Functional classRural Principal Arterial - Other

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length297 ft (90.5 m)
Longest span70 ft (21.3 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,008 (2022)
Projected traffic7,900 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed34.8 mi (56 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 20 (hwy 33) over Marys River & Wprr built?

It was built in 1955, making it 70 years old in 2025.

What condition is US 20 (hwy 33) over Marys River & Wprr 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 2023.

How much traffic does US 20 (hwy 33) over Marys River & Wprr carry?

About 7,008 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is US 20 (hwy 33) over Marys River & Wprr?

The structure is 297 ft (90.5 m) long with a longest span of 70 ft (21.3 m) and a deck 34 ft wide.

Who owns US 20 (hwy 33) over Marys River & Wprr?

It is owned by the State Highway Agency.