US Bridges

NE Seavy Ave over Stewart Slough

Fair

Benton County, Oregon · 004 MI W of HWY 20 · Structure no. 21063 000 00036

Built
2008
17 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
493
2020 count
Owner
County
County Highway Agency

About this bridge

NE Seavy Ave over Stewart Slough is a prestressed concrete slab carrying NE Seavy Ave over Stewart Slough in Benton County, Oregon. It was built in 2008, so it is 17 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 493 vehicles a day, roughly 10% of them trucks, projected to reach 711 by 2040. The structure is 30 ft (9 m) long and 38 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesNE Seavy Ave
CrossesStewart Slough
Location004 MI W of HWY 20
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.59146, -123.23586
Functional classUrban 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9 m)
Longest span30 ft (9 m)
Deck width38 ft (11.7 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic493 (2020)
Projected traffic711 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 NE Seavy Ave over Stewart Slough built?

It was built in 2008, making it 17 years old in 2025.

What condition is NE Seavy Ave over Stewart Slough 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 NE Seavy Ave over Stewart Slough carry?

About 493 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is NE Seavy Ave over Stewart Slough?

The structure is 30 ft (9 m) long with a longest span of 30 ft (9 m) and a deck 38 ft wide.

Who owns NE Seavy Ave over Stewart Slough?

It is owned by the County Highway Agency.