US Bridges

SD020 over Ck

Fair

Potter County, South Dakota · 1.4 W JCT Sd 47 N · Structure no. 000000054288000

Built
1952
73 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
31 ft
3 main spans
Daily traffic
190
2024 count
Owner
State
State Highway Agency

About this bridge

SD020 over Ck is a concrete continuous culvert carrying SD020 over Ck in Potter 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 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 190 vehicles a day, roughly 27% of them trucks, projected to reach 300 by 2044. The structure is 31 ft (9.5 m) long. If it were closed, the detour would be 28 mi (45 km).

CarriesSD020
CrossesCk
Location1.4 W JCT Sd 47 N
RouteState Highway 20
Coordinates45.24611, -99.81978
Functional classRural Minor Arterial

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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating48.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length31 ft (9.5 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2024)
Projected traffic300 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$14,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SD020 over Ck built?

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

What condition is SD020 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 2024.

How much traffic does SD020 over Ck carry?

About 190 vehicles per day (2024 count), of which roughly 27% are trucks.

How long is SD020 over Ck?

The structure is 31 ft (9.5 m) long with a longest span of 10 ft (3 m).

Who owns SD020 over Ck?

It is owned by the State Highway Agency.