US Bridges

County Rt 12 over Svid Canal

Fair

Benton County, Washington · 00.39 NW S Missimer · Structure no. 083827000000000

Built
1930
95 years old
Condition
Fair
inspected February 2024
Type
Slab
Steel
Length
46 ft
1 main span
Daily traffic
3,360
2016 count
Owner
County
County Highway Agency

About this bridge

County Rt 12 over Svid Canal is a steel slab carrying County Rt 12 over Svid Canal in Benton County, Washington. It was built in 1930, so it is 95 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 3,360 vehicles a day, roughly 24% of them trucks, projected to reach 3,500 by 2038. The structure is 46 ft (14 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Rt 12
CrossesSvid Canal
Location00.39 NW S Missimer
RouteCounty Highway 21030
CountyBenton County
StateWashington
Coordinates46.23611, -119.81624
Functional classRural Major Collector

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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length46 ft (14 m)
Longest span44 ft (13.4 m)
Deck width31 ft (9.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,360 (2016)
Projected traffic3,500 by 2038
Trucks24%
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$830,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Rt 12 over Svid Canal built?

It was built in 1930, making it 95 years old in 2025.

What condition is County Rt 12 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 County Rt 12 over Svid Canal carry?

About 3,360 vehicles per day (2016 count), of which roughly 24% are trucks.

How long is County Rt 12 over Svid Canal?

The structure is 46 ft (14 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.

Who owns County Rt 12 over Svid Canal?

It is owned by the County Highway Agency.