US Bridges

396th Avenue over Enemy Ck

Fair

Davison County, South Dakota · 2.4S & 1W Mt Vernon · Structure no. 000000018020124

Built
1970
55 years old
Condition
Fair
inspected July 2024
Type
Channel Beam
Concrete
Length
26 ft
1 main span
Daily traffic
64
2022 count
Owner
County
County Highway Agency

About this bridge

396th Avenue over Enemy Ck is a concrete channel beam carrying 396th Avenue over Enemy Ck in Davison County, South Dakota. It was built in 1970, so it is 55 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 64 vehicles a day, roughly 2% of them trucks, projected to reach 64 by 2032. The structure is 26 ft (7.9 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries396th Avenue
CrossesEnemy Ck
Location2.4S & 1W Mt Vernon
RouteCounty Highway 0
Coordinates43.66824, -98.28541
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64 (2022)
Projected traffic64 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 396th Avenue over Enemy Ck built?

It was built in 1970, making it 55 years old in 2025.

What condition is 396th Avenue over Enemy Ck 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 July 2024.

How much traffic does 396th Avenue over Enemy Ck carry?

About 64 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 396th Avenue over Enemy Ck?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 25 ft wide.

Who owns 396th Avenue over Enemy Ck?

It is owned by the County Highway Agency.