US Bridges

County Road over Potholes East Canal

GoodPosted for load

Franklin County, Washington · 0.04 N JCT 516 · Structure no. 083975000000000

Built
1954
71 years old, rebuilt 1973
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
85 ft
3 main spans
Daily traffic
1,760
2020 count
Owner
County
County Highway Agency

About this bridge

County Road over Potholes East Canal is a prestressed concrete stringer/multi-beam or girder carrying County Road over Potholes East Canal in Franklin County, Washington. It was built in 1954 and reconstructed in 1973, so it is 71 years old, older 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. Its operating status is: posted for load restriction.

It carries about 1,760 vehicles a day, roughly 19% of them trucks, projected to reach 200 by 2040. The structure is 85 ft (25.9 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road
CrossesPotholes East Canal
Location0.04 N JCT 516
RouteCounty Highway 5060
CountyFranklin County
StateWashington
Coordinates46.4976, -119.21493
Functional classRural Major Collector

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 inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
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 rating12.5 US tons
Inventory rating9.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,760 (2020)
Projected traffic200 by 2040
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road over Potholes East Canal built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1973.

What condition is County Road over Potholes East 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 November 2022.

How much traffic does County Road over Potholes East Canal carry?

About 1,760 vehicles per day (2020 count), of which roughly 19% are trucks.

How long is County Road over Potholes East Canal?

The structure is 85 ft (25.9 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns County Road over Potholes East Canal?

It is owned by the County Highway Agency.