US Bridges

Harris Road over Marys River

Fair

Benton County, Oregon · Replaced Bridge # 14478. · Structure no. 18381 000

Built
1998
27 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
151 ft
1 main span
Daily traffic
199
2020 count
Owner
County
County Highway Agency

About this bridge

Harris Road over Marys River is a prestressed concrete stringer/multi-beam or girder carrying Harris Road over Marys River in Benton County, Oregon. It was built in 1998, so it is 27 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 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 199 vehicles a day, roughly 10% of them trucks, projected to reach 295 by 2040. The structure is 151 ft (46 m) long and 27 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesHarris Road
CrossesMarys River
LocationReplaced Bridge # 14478.
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.57912, -123.44089
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length151 ft (46 m)
Longest span146 ft (44.5 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic199 (2020)
Projected traffic295 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 1998, making it 27 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 199 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Harris Road over Marys River?

The structure is 151 ft (46 m) long with a longest span of 146 ft (44.5 m) and a deck 27 ft wide.

Who owns Harris Road over Marys River?

It is owned by the County Highway Agency.