US Bridges

Lateral C Road over Usis Canal

FairPosted for load

Yakima County, Washington · 00.46 S W Wapato RD · Structure no. 081611000000000

Built
1962
63 years old
Condition
Fair
inspected February 2023
Type
Channel Beam
Concrete
Length
69 ft
3 main spans
Daily traffic
375
2023 count
Owner
County
County Highway Agency

About this bridge

Lateral C Road over Usis Canal is a concrete channel beam carrying Lateral C Road over Usis Canal in Yakima County, Washington. It was built in 1962, so it is 63 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 375 vehicles a day, roughly 5% of them trucks, projected to reach 500 by 2043. The structure is 69 ft (21 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesLateral C Road
CrossesUsis Canal
Location00.46 S W Wapato RD
RouteCounty Highway 50350
CountyYakima County
StateWashington
Coordinates46.44167, -120.52167
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating20.7 US tons
Inventory rating16.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans3
Design loadH 20
Structure length69 ft (21 m)
Longest span23 ft (7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2023)
Projected traffic500 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$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lateral C Road over Usis Canal built?

It was built in 1962, making it 63 years old in 2025.

What condition is Lateral C Road over Usis 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 February 2023.

How much traffic does Lateral C Road over Usis Canal carry?

About 375 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Lateral C Road over Usis Canal?

The structure is 69 ft (21 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns Lateral C Road over Usis Canal?

It is owned by the County Highway Agency.