US Bridges

Wiest RD over Wiest Creek

Fair

Cowlitz County, Washington · 0.70 N Abernathy RD (3.22 · Structure no. 083486000000000

Built
1972
53 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
10
2020 count
Owner
County
County Highway Agency

About this bridge

Wiest RD over Wiest Creek is a concrete slab carrying Wiest RD over Wiest Creek in Cowlitz County, Washington. It was built in 1972, so it is 53 years old, older 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 6 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 10 vehicles a day, roughly 20% of them trucks, projected to reach 15 by 2040. The structure is 23 ft (7 m) long and 29 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesWiest RD
CrossesWiest Creek
Location0.70 N Abernathy RD (3.22
RouteCounty Highway 21150
CountyCowlitz County
StateWashington
Coordinates46.24222, -123.14778
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating28 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width29 ft (8.9 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2020)
Projected traffic15 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$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wiest RD over Wiest Creek built?

It was built in 1972, making it 53 years old in 2025.

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

About 10 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Wiest RD over Wiest Creek?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 29 ft wide.

Who owns Wiest RD over Wiest Creek?

It is owned by the County Highway Agency.