US Bridges

Delameter RD over Arkansas Creek

Fair

Cowlitz County, Washington · 0.59 W SR 411 (mp 11.33) · Structure no. 087289000000000

Built
1953
72 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
1,430
2020 count
Owner
County
County Highway Agency

About this bridge

Delameter RD over Arkansas Creek is a concrete continuous culvert carrying Delameter RD over Arkansas Creek in Cowlitz County, Washington. It was built in 1953, so it is 72 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 1,430 vehicles a day, roughly 5% of them trucks, projected to reach 2,000 by 2040. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesDelameter RD
CrossesArkansas Creek
Location0.59 W SR 411 (mp 11.33)
RouteCounty Highway 20901
Coordinates46.27167, -122.93528
Functional classRural Major 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 15
Structure length40 ft (12.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,430 (2020)
Projected traffic2,000 by 2040
Trucks5%
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$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Delameter RD over Arkansas Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is Delameter RD over Arkansas 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 September 2023.

How much traffic does Delameter RD over Arkansas Creek carry?

About 1,430 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Delameter RD over Arkansas Creek?

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Delameter RD over Arkansas Creek?

It is owned by the County Highway Agency.