US Bridges

Wiest RD over Abernathy Creek

Good

Cowlitz County, Washington · 0.01 N Abernathy RD (3.2) · Structure no. 086834000000000

Built
1993
32 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
84 ft
1 main span
Daily traffic
15
2020 count
Owner
County
County Highway Agency

About this bridge

Wiest RD over Abernathy Creek is a prestressed concrete tee beam carrying Wiest RD over Abernathy Creek in Cowlitz County, Washington. It was built in 1993, so it is 32 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 15 vehicles a day, roughly 20% of them trucks, projected to reach 25 by 2040. The structure is 84 ft (25.6 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWiest RD
CrossesAbernathy Creek
Location0.01 N Abernathy RD (3.2)
RouteCounty Highway 21150
Coordinates46.23306, -123.14889
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length84 ft (25.6 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2020)
Projected traffic25 by 2040
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Wiest RD over Abernathy Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is Wiest RD over Abernathy Creek 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 August 2023.

How much traffic does Wiest RD over Abernathy Creek carry?

About 15 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Wiest RD over Abernathy Creek?

The structure is 84 ft (25.6 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns Wiest RD over Abernathy Creek?

It is owned by the County Highway Agency.