US Bridges

Lateral B Rd. over Usis Canal

GoodPosted for load

Yakima County, Washington · 00.25 N of Evans RD · Structure no. 081631000000000

Built
1969
56 years old
Condition
Good
inspected February 2023
Type
Channel Beam
Concrete
Length
32 ft
1 main span
Daily traffic
615
2023 count
Owner
County
County Highway Agency

About this bridge

Lateral B Rd. over Usis Canal is a concrete channel beam carrying Lateral B Rd. over Usis Canal in Yakima County, Washington. It was built in 1969, so it is 56 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 615 vehicles a day, roughly 5% of them trucks, projected to reach 700 by 2043. The structure is 32 ft (9.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLateral B Rd.
CrossesUsis Canal
Location00.25 N of Evans RD
RouteCounty Highway 50370
Coordinates46.43833, -120.50167
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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.4 US tons
Inventory rating21.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic615 (2023)
Projected traffic700 by 2043
Trucks5%
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 Lateral B Rd. over Usis Canal built?

It was built in 1969, making it 56 years old in 2025.

What condition is Lateral B Rd. over Usis Canal 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 February 2023.

How much traffic does Lateral B Rd. over Usis Canal carry?

About 615 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Lateral B Rd. over Usis Canal?

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

Who owns Lateral B Rd. over Usis Canal?

It is owned by the County Highway Agency.