US Bridges

County Highway over Potholes East Canal

GoodPosted for load

Franklin County, Washington · 0.08E Colonial 669 · Structure no. 084104000000000

Built
1956
69 years old, rebuilt 1973
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
85 ft
3 main spans
Daily traffic
480
2023 count
Owner
County
County Highway Agency

About this bridge

County Highway over Potholes East Canal is a prestressed concrete stringer/multi-beam or girder carrying County Highway over Potholes East Canal in Franklin County, Washington. It was built in 1956 and reconstructed in 1973, so it is 69 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 480 vehicles a day, roughly 40% of them trucks, projected to reach 710 by 2040. The structure is 85 ft (25.9 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCounty Highway
CrossesPotholes East Canal
Location0.08E Colonial 669
RouteCounty Highway 6900
Coordinates46.57676, -119.09317
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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating21.8 US tons
Inventory rating12.5 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2023)
Projected traffic710 by 2040
Trucks40%
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$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Potholes East Canal built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1973.

What condition is County Highway 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 December 2023.

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

About 480 vehicles per day (2023 count), of which roughly 40% are trucks.

How long is County Highway 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 28 ft wide.

Who owns County Highway over Potholes East Canal?

It is owned by the County Highway Agency.