US Bridges

409th Avenue over Creek

Poor

Beadle County, South Dakota · 8.2S of Cavour · Structure no. 000000003330262

Built
1935
90 years old
Condition
Poor
inspected August 2023
Type
Culvert
Concrete
Length
20 ft
2 main spans
Daily traffic
120
2022 count
Owner
County
County Highway Agency

About this bridge

409th Avenue over Creek is a concrete culvert carrying 409th Avenue over Creek in Beadle County, South Dakota. It was built in 1935, 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 120 vehicles a day, roughly 3% of them trucks, projected to reach 120 by 2032. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Carries409th Avenue
CrossesCreek
Location8.2S of Cavour
RouteCounty Highway 0
Coordinates44.24895, -98.03395
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2022)
Projected traffic120 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Creek built?

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

What condition is 409th Avenue over Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does 409th Avenue over Creek carry?

About 120 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 409th Avenue over Creek?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m).

Who owns 409th Avenue over Creek?

It is owned by the County Highway Agency.