US Bridges

Harris Road over Marys River

FairPosted for load

Benton County, Oregon · 0026 MI W of Wren · Structure no. 14449A000

Built
1965
60 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
120 ft
1 main span
Daily traffic
187
2020 count
Owner
County
County Highway Agency

About this bridge

Harris Road over Marys River is a prestressed concrete tee beam carrying Harris Road over Marys River in Benton County, Oregon. It was built in 1965, so it is 60 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 load restriction.

It carries about 187 vehicles a day, roughly 10% of them trucks, projected to reach 274 by 2040. The structure is 120 ft (36.6 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesHarris Road
CrossesMarys River
Location0026 MI W of Wren
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.58548, -123.4309
Functional classRural Local

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 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 alignment6: Equal to present minimum criteria
Operating rating29.4 US tons
Inventory rating22.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1 (+2 approach)
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic187 (2020)
Projected traffic274 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Harris Road over Marys River built?

It was built in 1965, making it 60 years old in 2025.

What condition is Harris Road over Marys River 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 Harris Road over Marys River carry?

About 187 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Harris Road over Marys River?

The structure is 120 ft (36.6 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns Harris Road over Marys River?

It is owned by the County Highway Agency.