US Bridges

405th Avenue over Pearl Creek

FairPosted for load

Beadle County, South Dakota · 4W & 8.3S of Cavour · Structure no. 000000003290263

Built
1953
72 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
163 ft
5 main spans
Daily traffic
80
2022 count
Owner
County
County Highway Agency

About this bridge

405th Avenue over Pearl Creek is a concrete continuous slab carrying 405th Avenue over Pearl Creek in Beadle County, South Dakota. It was built in 1953, so it is 72 years old, older than the South Dakota average of 48.9 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. Its operating status is: posted for load restriction.

It carries about 80 vehicles a day, roughly 3% of them trucks, projected to reach 80 by 2032. The structure is 163 ft (49.7 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries405th Avenue
CrossesPearl Creek
Location4W & 8.3S of Cavour
RouteCounty Highway 0
Coordinates44.24937, -98.11428
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.5 US tons
Inventory rating17.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 15
Structure length163 ft (49.7 m)
Longest span35 ft (10.7 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic80 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 405th Avenue over Pearl Creek built?

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

What condition is 405th Avenue over Pearl 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 2024.

How much traffic does 405th Avenue over Pearl Creek carry?

About 80 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 405th Avenue over Pearl Creek?

The structure is 163 ft (49.7 m) long with a longest span of 35 ft (10.7 m) and a deck 28 ft wide.

Who owns 405th Avenue over Pearl Creek?

It is owned by the County Highway Agency.