US Bridges

27100 418 Ave. over Twelve Mile Ck

Fair

Hutchinson County, South Dakota · 1.9W 2.2N Milltown · Structure no. 000000034140030

Built
1992
33 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
27
2022 count
Owner
County
County Highway Agency

About this bridge

27100 418 Ave. over Twelve Mile Ck is a prestressed concrete tee beam carrying 27100 418 Ave. over Twelve Mile Ck in Hutchinson County, South Dakota. It was built in 1992, so it is 33 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 27 vehicles a day, roughly 3% of them trucks, projected to reach 27 by 2032. The structure is 65 ft (19.8 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Carries27100 418 Ave.
CrossesTwelve Mile Ck
Location1.9W 2.2N Milltown
RouteCounty Highway 0
Coordinates43.45657, -97.83857
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
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 geometry6: Equal to present minimum criteria
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 length65 ft (19.8 m)
Longest span62 ft (19 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27 (2022)
Projected traffic27 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 27100 418 Ave. over Twelve Mile Ck built?

It was built in 1992, making it 33 years old in 2025.

What condition is 27100 418 Ave. over Twelve Mile Ck 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 27100 418 Ave. over Twelve Mile Ck carry?

About 27 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 27100 418 Ave. over Twelve Mile Ck?

The structure is 65 ft (19.8 m) long with a longest span of 62 ft (19 m) and a deck 27 ft wide.

Who owns 27100 418 Ave. over Twelve Mile Ck?

It is owned by the County Highway Agency.