US Bridges

8 RD NW over West Canal

FairPosted for load

Grant County, Washington · 8 NW .7 W of R NW · Structure no. 083217000000000

Built
1953
72 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
108 ft
4 main spans
Daily traffic
253
2021 count
Owner
County
County Highway Agency

About this bridge

8 RD NW over West Canal is a wood or timber stringer/multi-beam or girder carrying 8 RD NW over West Canal in Grant County, Washington. It was built in 1953, so it is 72 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 253 vehicles a day, roughly 15% of them trucks, projected to reach 300 by 2043. The structure is 108 ft (32.9 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries8 RD NW
CrossesWest Canal
Location8 NW .7 W of R NW
RouteCounty Highway 31900
CountyGrant County
StateWashington
Coordinates47.20395, -119.89116
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 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length108 ft (32.9 m)
Longest span27 ft (8.2 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic253 (2021)
Projected traffic300 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$4.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 8 RD NW over West Canal built?

It was built in 1953, making it 72 years old in 2025.

What condition is 8 RD NW 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 8 RD NW over West Canal carry?

About 253 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is 8 RD NW over West Canal?

The structure is 108 ft (32.9 m) long with a longest span of 27 ft (8.2 m) and a deck 25 ft wide.

Who owns 8 RD NW over West Canal?

It is owned by the County Highway Agency.