US Bridges

Abernathy Creek RD over Abernathy Creek

Fair

Cowlitz County, Washington · 5.62 N of SR 4 (mp 48.32) · Structure no. 083154000000000

Built
1976
49 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
200
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 1976, so it is 49 years old, younger 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 200 vehicles a day, roughly 20% of them trucks, projected to reach 275 by 2040. The structure is 56 ft (17.1 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesAbernathy Creek RD
CrossesAbernathy Creek
Location5.62 N of SR 4 (mp 48.32)
RouteCounty Highway 20930
CountyCowlitz County
StateWashington
Coordinates46.25972, -123.17583
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.3 US tons
Inventory rating16.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span52 ft (15.8 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2020)
Projected traffic275 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$2.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Abernathy Creek RD over Abernathy Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Abernathy Creek RD over Abernathy Creek 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 August 2023.

How much traffic does Abernathy Creek RD over Abernathy Creek carry?

About 200 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Abernathy Creek RD over Abernathy Creek?

The structure is 56 ft (17.1 m) long with a longest span of 52 ft (15.8 m) and a deck 31 ft wide.

Who owns Abernathy Creek RD over Abernathy Creek?

It is owned by the County Highway Agency.