US Bridges

412th Avenue over Creek

Fair

Day County, South Dakota · 4 W & 1.2 N of Andover · Structure no. 000000019000108

Built
1934
91 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
69
2022 count
Owner
County
County Highway Agency

About this bridge

412th Avenue over Creek is a concrete continuous culvert carrying 412th Avenue over Creek in Day County, South Dakota. It was built in 1934, so it is 91 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 5 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 69 vehicles a day, roughly 2% of them trucks, projected to reach 69 by 2032. The structure is 21 ft (6.4 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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Carries412th Avenue
CrossesCreek
Location4 W & 1.2 N of Andover
CountyDay County
StateSouth Dakota
Coordinates45.43241, -97.98027
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69 (2022)
Projected traffic69 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 412th Avenue over Creek built?

It was built in 1934, making it 91 years old in 2025.

What condition is 412th Avenue over 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 May 2024.

How much traffic does 412th Avenue over Creek carry?

About 69 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 412th Avenue over Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 25 ft wide.

Who owns 412th Avenue over Creek?

It is owned by the County Highway Agency.