US Bridges

Case Road over Roza Canal

Fair

Benton County, Washington · 0.60 N Hanks RD · Structure no. 081078000000000

Built
1973
52 years old
Condition
Fair
inspected February 2024
Type
Channel Beam
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
599
2016 count
Owner
County
County Highway Agency

About this bridge

Case Road over Roza Canal is a prestressed concrete channel beam carrying Case Road over Roza Canal in Benton County, Washington. It was built in 1973, so it is 52 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.

It carries about 599 vehicles a day, roughly 25% of them trucks, projected to reach 700 by 2038. The structure is 29 ft (8.8 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCase Road
CrossesRoza Canal
Location0.60 N Hanks RD
RouteCounty Highway 31550
CountyBenton County
StateWashington
Coordinates46.28071, -119.66206
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
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 rating61.4 US tons
Inventory rating36.8 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic599 (2016)
Projected traffic700 by 2038
Trucks25%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Case Road over Roza Canal built?

It was built in 1973, making it 52 years old in 2025.

What condition is Case Road over Roza 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 2024.

How much traffic does Case Road over Roza Canal carry?

About 599 vehicles per day (2016 count), of which roughly 25% are trucks.

How long is Case Road over Roza Canal?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns Case Road over Roza Canal?

It is owned by the County Highway Agency.