US Bridges

I RD SW over West Canal

FairPosted for load

Grant County, Washington · I SW .7 North of 11 · Structure no. 083795000000000

Built
1956
69 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
63 ft
2 main spans
Daily traffic
71
2020 count
Owner
County
County Highway Agency

About this bridge

I RD SW over West Canal is a wood or timber stringer/multi-beam or girder carrying I RD SW over West Canal in Grant County, Washington. It was built in 1956, so it is 69 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. Its operating status is: posted for load restriction.

It carries about 71 vehicles a day, roughly 40% of them trucks, projected to reach 175 by 2042. The structure is 63 ft (19.2 m) long and 25 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesI RD SW
CrossesWest Canal
LocationI SW .7 North of 11
RouteCounty Highway 12410
CountyGrant County
StateWashington
Coordinates46.93827, -119.6852
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 protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.9 US tons
Inventory rating14 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length63 ft (19.2 m)
Longest span31 ft (9.4 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2020)
Projected traffic175 by 2042
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I RD SW over West Canal built?

It was built in 1956, making it 69 years old in 2025.

What condition is I RD SW over West 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 November 2024.

How much traffic does I RD SW over West Canal carry?

About 71 vehicles per day (2020 count), of which roughly 40% are trucks.

How long is I RD SW over West Canal?

The structure is 63 ft (19.2 m) long with a longest span of 31 ft (9.4 m) and a deck 25 ft wide.

Who owns I RD SW over West Canal?

It is owned by the County Highway Agency.