US Bridges

409th Ave over Creek

Poor

Spink County, South Dakota · 3E & 0.9S Conde · Structure no. 000000058330069

Built
1935
90 years old, rebuilt 1955
Condition
Poor
inspected August 2023
Type
Slab
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

409th Ave over Creek is a concrete continuous slab carrying 409th Ave over Creek in Spink County, South Dakota. It was built in 1935 and reconstructed in 1955, 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 34 vehicles a day, roughly 2% of them trucks, projected to reach 34 by 2032. The structure is 33 ft (10.1 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries409th Ave
CrossesCreek
Location3E & 0.9S Conde
RouteCounty Highway 0
Coordinates45.13946, -98.04307
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span16 ft (4.9 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2032
Trucks2%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 409th Ave over Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1955.

What condition is 409th Ave 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 Ave over Creek carry?

About 34 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 409th Ave over Creek?

The structure is 33 ft (10.1 m) long with a longest span of 16 ft (4.9 m) and a deck 26 ft wide.

Who owns 409th Ave over Creek?

It is owned by the County Highway Agency.