US Bridges

South Bank Road over Delezenne Creek

Fair

Grays Harbor County, Washington · 0.1 Mi. NW Delezenne RD · Structure no. 081492000000000

Built
1971
54 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
1,007
2020 count
Owner
County
County Highway Agency

About this bridge

South Bank Road over Delezenne Creek is a concrete continuous slab carrying South Bank Road over Delezenne Creek in Grays Harbor County, Washington. It was built in 1971, so it is 54 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 1,007 vehicles a day, roughly 22% of them trucks, projected to reach 1,229 by 2044. The structure is 103 ft (31.5 m) long and 28 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesSouth Bank Road
CrossesDelezenne Creek
Location0.1 Mi. NW Delezenne RD
RouteCounty Highway 96411
Coordinates46.96889, -123.38056
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length103 ft (31.5 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,007 (2020)
Projected traffic1,229 by 2044
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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$4.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was South Bank Road over Delezenne Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is South Bank Road over Delezenne 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 November 2024.

How much traffic does South Bank Road over Delezenne Creek carry?

About 1,007 vehicles per day (2020 count), of which roughly 22% are trucks.

How long is South Bank Road over Delezenne Creek?

The structure is 103 ft (31.5 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns South Bank Road over Delezenne Creek?

It is owned by the County Highway Agency.