US Bridges

County Line Road over Roza Canal

Good

Yakima County, Washington · 00.45 N Alexander · Structure no. 084925000000000

Built
1978
47 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
808
2021 count
Owner
County
County Highway Agency

About this bridge

County Line Road over Roza Canal is a prestressed concrete stringer/multi-beam or girder carrying County Line Road over Roza Canal in Yakima County, Washington. It was built in 1978, so it is 47 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 808 vehicles a day, roughly 5% of them trucks, projected to reach 975 by 2041. The structure is 57 ft (17.4 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty Line Road
CrossesRoza Canal
Location00.45 N Alexander
RouteCounty Highway 65450
CountyYakima County
StateWashington
Coordinates46.30833, -119.87368
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 rating32.8 US tons
Inventory rating18.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span56 ft (17.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic808 (2021)
Projected traffic975 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$2.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Line Road over Roza Canal built?

It was built in 1978, making it 47 years old in 2025.

What condition is County Line 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 March 2023.

How much traffic does County Line Road over Roza Canal carry?

About 808 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is County Line Road over Roza Canal?

The structure is 57 ft (17.4 m) long with a longest span of 56 ft (17.1 m) and a deck 32 ft wide.

Who owns County Line Road over Roza Canal?

It is owned by the County Highway Agency.