US Bridges

409th Avenue over Middle Pearl Creek

Fair

Beadle County, South Dakota · 6.1S of Cavour · Structure no. 000000003330241

Built
1935
90 years old, rebuilt 1970
Condition
Fair
inspected August 2023
Type
Channel Beam
Concrete
Length
60 ft
2 main spans
Daily traffic
170
2022 count
Owner
County
County Highway Agency

About this bridge

409th Avenue over Middle Pearl Creek is a concrete channel beam carrying 409th Avenue over Middle Pearl Creek in Beadle County, South Dakota. It was built in 1935 and reconstructed in 1970, so it is 90 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.

It carries about 170 vehicles a day, roughly 3% of them trucks, projected to reach 170 by 2032. The structure is 60 ft (18.3 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
Carries409th Avenue
CrossesMiddle Pearl Creek
Location6.1S of Cavour
RouteCounty Highway 0
CountyBeadle County
StateSouth Dakota
Coordinates44.2813, -98.03397
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2022)
Projected traffic170 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 409th Avenue over Middle Pearl Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1970.

What condition is 409th Avenue over Middle 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 2023.

How much traffic does 409th Avenue over Middle Pearl Creek carry?

About 170 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 409th Avenue over Middle Pearl Creek?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns 409th Avenue over Middle Pearl Creek?

It is owned by the County Highway Agency.