US Bridges

Abernathy Creek RD over Abernathy Creek

Good

Cowlitz County, Washington · 1.40 N of SR 4 (mp 48.32) · Structure no. 087385000000000

Built
2005
20 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
371
2020 count
Owner
County
County Highway Agency

About this bridge

Abernathy Creek RD over Abernathy Creek is a prestressed concrete stringer/multi-beam or girder carrying Abernathy Creek RD over Abernathy Creek in Cowlitz County, Washington. It was built in 2005, so it is 20 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 371 vehicles a day, roughly 11% of them trucks, projected to reach 504 by 2038. The structure is 108 ft (32.9 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesAbernathy Creek RD
CrossesAbernathy Creek
Location1.40 N of SR 4 (mp 48.32)
RouteCounty Highway 20930
Coordinates46.20861, -123.1525
Functional classRural Minor 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.2 US tons
Inventory rating53.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length108 ft (32.9 m)
Longest span103 ft (31.4 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic371 (2020)
Projected traffic504 by 2038
Trucks11%
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$4.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Abernathy Creek RD over Abernathy Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Abernathy Creek 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 Abernathy Creek RD over Abernathy Creek carry?

About 371 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Abernathy Creek RD over Abernathy Creek?

The structure is 108 ft (32.9 m) long with a longest span of 103 ft (31.4 m) and a deck 35 ft wide.

Who owns Abernathy Creek RD over Abernathy Creek?

It is owned by the County Highway Agency.