US Bridges

K SW S of 7 SW over West Canal

Fair

Grant County, Washington · K SW .01 S of Frenchmen · Structure no. 080549000000000

Built
1951
74 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
83 ft
3 main spans
Daily traffic
49
2022 count
Owner
County
County Highway Agency

About this bridge

K SW S of 7 SW over West Canal is a wood or timber stringer/multi-beam or girder carrying K SW S of 7 SW over West Canal in Grant County, Washington. It was built in 1951, so it is 74 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 49 vehicles a day, roughly 27% of them trucks, projected to reach 100 by 2044. The structure is 83 ft (25.3 m) long and 25 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesK SW S of 7 SW
CrossesWest Canal
LocationK SW .01 S of Frenchmen
RouteCounty Highway 12355
Coordinates46.98633, -119.72747
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating28 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 15
Structure length83 ft (25.3 m)
Longest span29 ft (8.8 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49 (2022)
Projected traffic100 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was K SW S of 7 SW over West Canal built?

It was built in 1951, making it 74 years old in 2025.

What condition is K SW S of 7 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 K SW S of 7 SW over West Canal carry?

About 49 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is K SW S of 7 SW over West Canal?

The structure is 83 ft (25.3 m) long with a longest span of 29 ft (8.8 m) and a deck 25 ft wide.

Who owns K SW S of 7 SW over West Canal?

It is owned by the County Highway Agency.