US Bridges

Wilgus RD over Svid Canal

Fair

Benton County, Washington · .516 MI S CO Rt 12 · Structure no. 086353000000000

Built
1959
66 years old
Condition
Fair
inspected February 2024
Type
Channel Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
350
2018 count
Owner
County
County Highway Agency

About this bridge

Wilgus RD over Svid Canal is a prestressed concrete channel beam carrying Wilgus RD over Svid Canal in Benton County, Washington. It was built in 1959, so it is 66 years old, older than the Washington average of 49.8 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 350 vehicles a day, roughly 10% of them trucks, projected to reach 500 by 2038. The structure is 32 ft (9.8 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesWilgus RD
CrossesSvid Canal
Location.516 MI S CO Rt 12
RouteCounty Highway 20570
CountyBenton County
StateWashington
Coordinates46.23302, -119.83143
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating51.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2018)
Projected traffic500 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$365,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilgus RD over Svid Canal built?

It was built in 1959, making it 66 years old in 2025.

What condition is Wilgus RD over Svid Canal 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 February 2024.

How much traffic does Wilgus RD over Svid Canal carry?

About 350 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Wilgus RD over Svid Canal?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 24 ft wide.

Who owns Wilgus RD over Svid Canal?

It is owned by the County Highway Agency.