US Bridges

SD020 over Ck

Fair

Spink County, South Dakota · 0.2 W JCT Sd 37 · Structure no. 000000058297060

Built
1958
67 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
25 ft
3 main spans
Daily traffic
590
2024 count
Owner
State
State Highway Agency

About this bridge

SD020 over Ck is a concrete continuous culvert carrying SD020 over Ck in Spink County, South Dakota. It was built in 1958, so it is 67 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 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 590 vehicles a day, roughly 37% of them trucks, projected to reach 803 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 39.1 mi (63 km).

CarriesSD020
CrossesCk
Location0.2 W JCT Sd 37
RouteState Highway 20
Coordinates45.15426, -98.11048
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 rating99 US tons
Inventory rating79.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 20
Structure length25 ft (7.6 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 traffic590 (2024)
Projected traffic803 by 2044
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.1 mi (63 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$12,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SD020 over Ck built?

It was built in 1958, making it 67 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 June 2024.

How much traffic does SD020 over Ck carry?

About 590 vehicles per day (2024 count), of which roughly 37% are trucks.

How long is SD020 over Ck?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m).

Who owns SD020 over Ck?

It is owned by the State Highway Agency.