US Bridges

Harris Road over Marys River

FairPosted for load

Benton County, Oregon · 0251 MI W of Wren · Structure no. 01441 000

Built
1929
96 years old, rebuilt 2006
Condition
Fair
inspected July 2024
Type
Truss - Thru
Wood or Timber
Length
137 ft
1 main span
Daily traffic
84
2021 count
Owner
County
County Highway Agency

About this bridge

Harris Road over Marys River is a wood or timber truss - thru carrying Harris Road over Marys River in Benton County, Oregon. It was built in 1929 and reconstructed in 2006, so it is 96 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 84 vehicles a day, projected to reach 113 by 2041. The structure is 137 ft (41.8 m) long and 18 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesHarris Road
CrossesMarys River
Location0251 MI W of Wren
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.58004, -123.46021
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.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating17.5 US tons
Inventory rating13.6 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1 (+4 approach)
Design loadH 15
Structure length137 ft (41.8 m)
Longest span75 ft (22.9 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deck11 ft (3.3 m)

Traffic and service

Average daily traffic84 (2021)
Projected traffic113 by 2041
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on 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 1929, making it 96 years old in 2025. It was reconstructed in 2006.

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 84 vehicles per day (2021 count).

How long is Harris Road over Marys River?

The structure is 137 ft (41.8 m) long with a longest span of 75 ft (22.9 m) and a deck 18 ft wide.

Who owns Harris Road over Marys River?

It is owned by the County Highway Agency.