US Bridges

County Highway over Potholes East Canal

Fair

Franklin County, Washington · 0.48N JCT R 506 · Structure no. 083437000000000

Built
1954
71 years old, rebuilt 1972
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
50 ft
2 main spans
Daily traffic
2,303
2020 count
Owner
County
County Highway Agency

About this bridge

County Highway over Potholes East Canal is a prestressed concrete tee beam carrying County Highway over Potholes East Canal in Franklin County, Washington. It was built in 1954 and reconstructed in 1972, 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 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 2,303 vehicles a day, roughly 42% of them trucks, projected to reach 3,450 by 2040. The structure is 50 ft (15.2 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCounty Highway
CrossesPotholes East Canal
Location0.48N JCT R 506
RouteCounty Highway 9010
CountyFranklin County
StateWashington
Coordinates46.49538, -119.13204
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation4: Meets minimum tolerable limits to be 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 rating21.8 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span25 ft (7.6 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,303 (2020)
Projected traffic3,450 by 2040
Trucks42%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Potholes East Canal built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1972.

What condition is County Highway over Potholes East 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 November 2023.

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

About 2,303 vehicles per day (2020 count), of which roughly 42% are trucks.

How long is County Highway over Potholes East Canal?

The structure is 50 ft (15.2 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.

Who owns County Highway over Potholes East Canal?

It is owned by the County Highway Agency.