US Bridges

27080 405 Ave. over South Fork Twelve Mile C

FairPosted for load

Hutchinson County, South Dakota · 5 W & 0.8 S Dimock · Structure no. 000000034010028

Built
1952
73 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
103 ft
3 main spans
Daily traffic
69
2022 count
Owner
County
County Highway Agency

About this bridge

27080 405 Ave. over South Fork Twelve Mile C is a steel stringer/multi-beam or girder carrying 27080 405 Ave. over South Fork Twelve Mile C in Hutchinson County, South Dakota. It was built in 1952, so it is 73 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. Its operating status is: posted for load restriction.

It carries about 69 vehicles a day, roughly 2% of them trucks, projected to reach 69 by 2032. The structure is 103 ft (31.5 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries27080 405 Ave.
CrossesSouth Fork Twelve Mile C
Location5 W & 0.8 S Dimock
RouteCounty Highway 0
Coordinates43.45923, -98.0964
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.5 US tons
Inventory rating21.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length103 ft (31.5 m)
Longest span33 ft (10.1 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 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 closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible 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 27080 405 Ave. over South Fork Twelve Mile C built?

It was built in 1952, making it 73 years old in 2025.

What condition is 27080 405 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 27080 405 Ave. over South Fork Twelve Mile C carry?

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

How long is 27080 405 Ave. over South Fork Twelve Mile C?

The structure is 103 ft (31.5 m) long with a longest span of 33 ft (10.1 m) and a deck 26 ft wide.

Who owns 27080 405 Ave. over South Fork Twelve Mile C?

It is owned by the County Highway Agency.