US Bridges

Washout Road over Roza Canal

Good

Yakima County, Washington · 00.08 S Williamson · Structure no. 079739000000000

Built
1987
38 years old
Condition
Good
inspected February 2023
Type
Channel Beam
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
315
2023 count
Owner
County
County Highway Agency

About this bridge

Washout Road over Roza Canal is a prestressed concrete channel beam carrying Washout Road over Roza Canal in Yakima County, Washington. It was built in 1987, so it is 38 years old, younger 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.

It carries about 315 vehicles a day, roughly 5% of them trucks, projected to reach 350 by 2043. The structure is 61 ft (18.6 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesWashout Road
CrossesRoza Canal
Location00.08 S Williamson
RouteCounty Highway 64900
CountyYakima County
StateWashington
Coordinates46.38816, -119.99891
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 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating20.7 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span60 ft (18.3 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic315 (2023)
Projected traffic350 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$2.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Washout Road over Roza Canal built?

It was built in 1987, making it 38 years old in 2025.

What condition is Washout Road over Roza 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 Washout Road over Roza Canal carry?

About 315 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Washout Road over Roza Canal?

The structure is 61 ft (18.6 m) long with a longest span of 60 ft (18.3 m) and a deck 32 ft wide.

Who owns Washout Road over Roza Canal?

It is owned by the County Highway Agency.