US Bridges

B RD SE over Irrigation Canal

FairPosted for load

Grant County, Washington · B SE 0.7 N of 12 SE · Structure no. 084543000000000

Built
1953
72 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
32 ft
1 main span
Daily traffic
325
2021 count
Owner
County
County Highway Agency

About this bridge

B RD SE over Irrigation Canal is a wood or timber stringer/multi-beam or girder carrying B RD SE over Irrigation 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 325 vehicles a day, roughly 18% of them trucks, projected to reach 650 by 2043. The structure is 32 ft (9.8 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesB RD SE
CrossesIrrigation Canal
LocationB SE 0.7 N of 12 SE
RouteCounty Highway 20550
CountyGrant County
StateWashington
Coordinates46.92199, -119.45137
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.9 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2021)
Projected traffic650 by 2043
Trucks18%
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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was B RD SE over Irrigation Canal built?

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

What condition is B RD SE over Irrigation 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 B RD SE over Irrigation Canal carry?

About 325 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is B RD SE over Irrigation Canal?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 25 ft wide.

Who owns B RD SE over Irrigation Canal?

It is owned by the County Highway Agency.