US Bridges

Mcdonald Rd. over Usis Canal

Fair

Yakima County, Washington · 00.51 W So Wapato · Structure no. 080058000000000

Built
1956
69 years old
Condition
Fair
inspected March 2023
Type
Channel Beam
Concrete
Length
22 ft
1 main span
Daily traffic
325
2023 count
Owner
County
County Highway Agency

About this bridge

Mcdonald Rd. over Usis Canal is a concrete channel beam carrying Mcdonald Rd. over Usis Canal in Yakima County, Washington. It was built in 1956, so it is 69 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 325 vehicles a day, roughly 5% of them trucks, projected to reach 500 by 2043. The structure is 22 ft (6.7 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesMcdonald Rd.
CrossesUsis Canal
Location00.51 W So Wapato
RouteCounty Highway 50420
CountyYakima County
StateWashington
Coordinates46.39, -120.43667
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadH 20
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (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$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcdonald Rd. over Usis Canal built?

It was built in 1956, making it 69 years old in 2025.

What condition is Mcdonald Rd. 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 March 2023.

How much traffic does Mcdonald Rd. over Usis Canal carry?

About 325 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Mcdonald Rd. over Usis Canal?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 24 ft wide.

Who owns Mcdonald Rd. over Usis Canal?

It is owned by the County Highway Agency.