US Bridges

E RD SE over Irrigation Lateral

GoodPosted for load

Grant County, Washington · E SE at 14.8 · Structure no. 081728000000000

Built
1959
66 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
1 main span
Daily traffic
80
2022 count
Owner
County
County Highway Agency

About this bridge

E RD SE over Irrigation Lateral is a wood or timber stringer/multi-beam or girder carrying E RD SE over Irrigation Lateral in Grant County, Washington. It was built in 1959, so it is 66 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 80 vehicles a day, roughly 22% of them trucks, projected to reach 125 by 2044. The structure is 31 ft (9.4 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesE RD SE
CrossesIrrigation Lateral
LocationE SE at 14.8
RouteCounty Highway 20790
CountyGrant County
StateWashington
Coordinates46.8868, -119.36882
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41 US tons
Inventory rating28 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 traffic80 (2022)
Projected traffic125 by 2044
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 E RD SE over Irrigation Lateral built?

It was built in 1959, making it 66 years old in 2025.

What condition is E RD SE over Irrigation Lateral in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

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

About 80 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is E 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 E RD SE over Irrigation Lateral?

It is owned by the County Highway Agency.