US Bridges

27140 417 Ave. over South Fork Twelve Mile C

PoorPosted for load

Hutchinson County, South Dakota · 6 E 3.6 N Parkston · Structure no. 000000034130034

Built
1983
42 years old
Condition
Poor
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

27140 417 Ave. over South Fork Twelve Mile C is a prestressed concrete tee beam carrying 27140 417 Ave. over South Fork Twelve Mile C in Hutchinson County, South Dakota. It was built in 1983, so it is 42 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 45 vehicles a day, roughly 2% of them trucks, projected to reach 68 by 2032. The structure is 66 ft (20.1 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries27140 417 Ave.
CrossesSouth Fork Twelve Mile C
Location6 E 3.6 N Parkston
RouteCounty Highway 0
Coordinates43.45312, -97.85828
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be 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 rating27 US tons
Inventory rating15.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length66 ft (20.1 m)
Longest span65 ft (19.8 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic68 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 27140 417 Ave. over South Fork Twelve Mile C built?

It was built in 1983, making it 42 years old in 2025.

What condition is 27140 417 Ave. over South Fork Twelve Mile C in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does 27140 417 Ave. over South Fork Twelve Mile C carry?

About 45 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 27140 417 Ave. over South Fork Twelve Mile C?

The structure is 66 ft (20.1 m) long with a longest span of 65 ft (19.8 m) and a deck 23 ft wide.

Who owns 27140 417 Ave. over South Fork Twelve Mile C?

It is owned by the County Highway Agency.