US Bridges

F RD SE over Irrigation Lateral

FairPosted for load

Grant County, Washington · F SE 0.5 S of 13 SE · Structure no. 081473000000000

Built
1954
71 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
1 main span
Daily traffic
307
2021 count
Owner
County
County Highway Agency

About this bridge

F RD SE over Irrigation Lateral is a wood or timber stringer/multi-beam or girder carrying F RD SE over Irrigation Lateral in Grant County, Washington. It was built in 1954, so it is 71 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 307 vehicles a day, roughly 30% of them trucks, projected to reach 600 by 2043. The structure is 31 ft (9.4 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesF RD SE
CrossesIrrigation Lateral
LocationF SE 0.5 S of 13 SE
RouteCounty Highway 20800
CountyGrant County
StateWashington
Coordinates46.88453, -119.36882
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 protection8 Very GoodNo problems noted.
Last inspectionDecember 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 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 length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic307 (2021)
Projected traffic600 by 2043
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 F RD SE over Irrigation Lateral built?

It was built in 1954, making it 71 years old in 2025.

What condition is F RD SE over Irrigation Lateral 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 December 2024.

How much traffic does F RD SE over Irrigation Lateral carry?

About 307 vehicles per day (2021 count), of which roughly 30% are trucks.

How long is F RD SE over Irrigation Lateral?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns F RD SE over Irrigation Lateral?

It is owned by the County Highway Agency.