US Bridges

Lateral B Rd. IRR over Canal

GoodPosted for load

Yakima County, Washington · 00.05 S Branch Road · Structure no. 084239000000000

Built
1963
62 years old
Condition
Good
inspected February 2023
Type
Channel Beam
Concrete
Length
31 ft
1 main span
Daily traffic
290
2019 count
Owner
County
County Highway Agency

About this bridge

Lateral B Rd. IRR over Canal is a concrete channel beam carrying Lateral B Rd. IRR over Canal in Yakima County, Washington. It was built in 1963, so it is 62 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 290 vehicles a day, roughly 5% of them trucks, projected to reach 340 by 2039. The structure is 31 ft (9.4 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLateral B Rd. IRR
CrossesCanal
Location00.05 S Branch Road
RouteCounty Highway 50370
Coordinates46.40443, -120.50246
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadH 20
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic290 (2019)
Projected traffic340 by 2039
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. IRR over Canal built?

It was built in 1963, making it 62 years old in 2025.

What condition is Lateral B Rd. IRR over 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. IRR over Canal carry?

About 290 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Lateral B Rd. IRR over Canal?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns Lateral B Rd. IRR over Canal?

It is owned by the County Highway Agency.