US Bridges

County Arterial over W B 5

Good

Franklin County, Washington · 0.01 S Fern RD 438 · Structure no. 080048000000000

Built
1957
68 years old, rebuilt 1972
Condition
Good
inspected December 2023
Type
Tee Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
2,966
2023 count
Owner
County
County Highway Agency

About this bridge

County Arterial over W B 5 is a prestressed concrete tee beam carrying County Arterial over W B 5 in Franklin County, Washington. It was built in 1957 and reconstructed in 1972, so it is 68 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,966 vehicles a day, roughly 30% of them trucks, projected to reach 3,100 by 2040. The structure is 32 ft (9.8 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Arterial
CrossesW B 5
Location0.01 S Fern RD 438
RouteCounty Highway 4000
CountyFranklin County
StateWashington
Coordinates46.64728, -119.17679
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
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 rating24.7 US tons
Inventory rating13.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,966 (2023)
Projected traffic3,100 by 2040
Trucks30%
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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Arterial over W B 5 built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1972.

What condition is County Arterial over W B 5 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 Arterial over W B 5 carry?

About 2,966 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is County Arterial over W B 5?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 30 ft wide.

Who owns County Arterial over W B 5?

It is owned by the County Highway Agency.