US Bridges

31660 412th Avenue over Emanuel Creek

Fair

Bon Homme County, South Dakota · 4W & 3.6S of Tyndall · Structure no. 000000005110156

Built
1977
48 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
100 ft
3 main spans
Daily traffic
41
2022 count
Owner
County
County Highway Agency

About this bridge

31660 412th Avenue over Emanuel Creek is a prestressed concrete tee beam carrying 31660 412th Avenue over Emanuel Creek in Bon Homme County, South Dakota. It was built in 1977, so it is 48 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 fair condition with a lowest component rating of 6 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 41 vehicles a day, roughly 2% of them trucks, projected to reach 41 by 2032. The structure is 100 ft (30.5 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries31660 412th Avenue
CrossesEmanuel Creek
Location4W & 3.6S of Tyndall
Coordinates42.94448, -97.95104
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating37.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic41 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 31660 412th Avenue over Emanuel Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is 31660 412th Avenue over Emanuel 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 2023.

How much traffic does 31660 412th Avenue over Emanuel Creek carry?

About 41 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 31660 412th Avenue over Emanuel Creek?

The structure is 100 ft (30.5 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns 31660 412th Avenue over Emanuel Creek?

It is owned by the County Highway Agency.