US Bridges

1st ST Plankinton over Ck

Fair

Aurora County, South Dakota · East Edge of Plankinton · Structure no. 000000002164151

Built
2008
17 years old
Condition
Fair
inspected July 2023
Type
Culvert
Steel
Length
33 ft
3 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

1st ST Plankinton over Ck is a steel culvert carrying 1st ST Plankinton over Ck in Aurora County, South Dakota. It was built in 2008, so it is 17 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 50 vehicles a day, roughly 9% of them trucks, projected to reach 60 by 2032. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries1st ST Plankinton
CrossesCk
LocationEast Edge of Plankinton
RouteCity Street 0
CountyAurora County
StateSouth Dakota
Coordinates43.71387, -98.47283
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 inspectionJuly 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.2 US tons
Inventory rating41.3 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHL 93
Structure length33 ft (10.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic60 by 2032
Trucks9%
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 1st ST Plankinton over Ck built?

It was built in 2008, making it 17 years old in 2025.

What condition is 1st ST Plankinton over 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 July 2023.

How much traffic does 1st ST Plankinton over Ck carry?

About 50 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is 1st ST Plankinton over Ck?

The structure is 33 ft (10.1 m) long with a longest span of 8 ft (2.4 m).

Who owns 1st ST Plankinton over Ck?

It is owned by the County Highway Agency.