US Bridges

406th Avenue over Enemy Ck

Good

Davison County, South Dakota · 2W 4.6 S Mitchell · Structure no. 000000018120146

Built
2009
16 years old
Condition
Good
inspected July 2022
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
114
2022 count
Owner
County
County Highway Agency

About this bridge

406th Avenue over Enemy Ck is a concrete continuous culvert carrying 406th Avenue over Enemy Ck in Davison County, South Dakota. It was built in 2009, so it is 16 years old, younger than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 114 vehicles a day, roughly 3% of them trucks, projected to reach 114 by 2025. The structure is 29 ft (8.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Carries406th Avenue
CrossesEnemy Ck
Location2W 4.6 S Mitchell
RouteCounty Highway 0
Coordinates43.63513, -98.08637
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating110.1 US tons
Inventory rating75.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length29 ft (8.7 m)
Longest span14 ft (4.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic114 (2022)
Projected traffic114 by 2025
Trucks3%
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 406th Avenue over Enemy Ck built?

It was built in 2009, making it 16 years old in 2025.

What condition is 406th Avenue over Enemy Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2022.

How much traffic does 406th Avenue over Enemy Ck carry?

About 114 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 406th Avenue over Enemy Ck?

The structure is 29 ft (8.7 m) long with a longest span of 14 ft (4.2 m).

Who owns 406th Avenue over Enemy Ck?

It is owned by the County Highway Agency.