US Bridges

26920 409 Ave. over South Fork Twelve Mile C

Fair

Hutchinson County, South Dakota · 6.8N 1.0W Parkston · Structure no. 000000034050012

Built
1977
48 years old
Condition
Fair
inspected May 2024
Type
Culvert
Steel
Length
40 ft
4 main spans
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

26920 409 Ave. over South Fork Twelve Mile C is a steel culvert carrying 26920 409 Ave. over South Fork Twelve Mile C in Hutchinson County, South Dakota. It was built in 1977, so it is 48 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 5 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 10 vehicles a day, roughly 2% of them trucks, projected to reach 39 by 2032. The structure is 40 ft (12.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries26920 409 Ave.
CrossesSouth Fork Twelve Mile C
Location6.8N 1.0W Parkston
RouteCounty Highway 0
CountyHutchinson County
StateSouth Dakota
Coordinates43.48376, -98.01682
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 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
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadUnknown
Structure length40 ft (12.3 m)
Longest span7 ft (2.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic39 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 26920 409 Ave. over South Fork Twelve Mile C built?

It was built in 1977, making it 48 years old in 2025.

What condition is 26920 409 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 26920 409 Ave. over South Fork Twelve Mile C carry?

About 10 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 26920 409 Ave. over South Fork Twelve Mile C?

The structure is 40 ft (12.3 m) long with a longest span of 7 ft (2.2 m).

Who owns 26920 409 Ave. over South Fork Twelve Mile C?

It is owned by the County Highway Agency.