US Bridges

27108 412 Ave. over South Fork Twelve Mile C

Fair

Hutchinson County, South Dakota · 1 E Dimock S.D. · Structure no. 000000034080016

Built
1984
41 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
69
2022 count
Owner
County
County Highway Agency

About this bridge

27108 412 Ave. over South Fork Twelve Mile C is a prestressed concrete tee beam carrying 27108 412 Ave. over South Fork Twelve Mile C in Hutchinson County, South Dakota. It was built in 1984, so it is 41 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 69 vehicles a day, roughly 2% of them trucks, projected to reach 69 by 2032. The structure is 60 ft (18.3 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries27108 412 Ave.
CrossesSouth Fork Twelve Mile C
Location1 E Dimock S.D.
RouteCounty Highway 0
Coordinates43.47811, -97.95766
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 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
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span59 ft (18 m)
Deck width23 ft (7 m)
Roadway width23 ft (7 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 closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 27108 412 Ave. over South Fork Twelve Mile C built?

It was built in 1984, making it 41 years old in 2025.

What condition is 27108 412 Ave. over South Fork Twelve Mile C 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 27108 412 Ave. over South Fork Twelve Mile C carry?

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

How long is 27108 412 Ave. over South Fork Twelve Mile C?

The structure is 60 ft (18.3 m) long with a longest span of 59 ft (18 m) and a deck 23 ft wide.

Who owns 27108 412 Ave. over South Fork Twelve Mile C?

It is owned by the County Highway Agency.