US Bridges

27020 415 Ave. over South Fork Twelve Mile C

Good

Hutchinson County, South Dakota · 4.2E & 0.7S Dimock · Structure no. 000000034108022

Built
1994
31 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
112 ft
3 main spans
Daily traffic
69
2022 count
Owner
County
County Highway Agency

About this bridge

27020 415 Ave. over South Fork Twelve Mile C is a concrete continuous slab carrying 27020 415 Ave. over South Fork Twelve Mile C in Hutchinson County, South Dakota. It was built in 1994, so it is 31 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 69 vehicles a day, roughly 2% of them trucks, projected to reach 69 by 2032. The structure is 112 ft (34.1 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries27020 415 Ave.
CrossesSouth Fork Twelve Mile C
Location4.2E & 0.7S Dimock
RouteCounty Highway 0
Coordinates43.46698, -97.89985
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating68.2 US tons
Inventory rating40.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length112 ft (34.1 m)
Longest span42 ft (12.8 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 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 27020 415 Ave. over South Fork Twelve Mile C built?

It was built in 1994, making it 31 years old in 2025.

What condition is 27020 415 Ave. over South Fork Twelve Mile C in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does 27020 415 Ave. over South Fork Twelve Mile C carry?

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

How long is 27020 415 Ave. over South Fork Twelve Mile C?

The structure is 112 ft (34.1 m) long with a longest span of 42 ft (12.8 m) and a deck 29 ft wide.

Who owns 27020 415 Ave. over South Fork Twelve Mile C?

It is owned by the County Highway Agency.