US Bridges

SD037 over Ck

Fair

Brown County, South Dakota · 2.9 N of Verdon · Structure no. 000000007300451

Built
1955
70 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
106 ft
3 main spans
Daily traffic
851
2024 count
Owner
State
State Highway Agency

About this bridge

SD037 over Ck is a concrete continuous slab carrying SD037 over Ck in Brown County, South Dakota. It was built in 1955, so it is 70 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 851 vehicles a day, roughly 18% of them trucks, projected to reach 1,128 by 2044. The structure is 106 ft (32.3 m) long and 34 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

CarriesSD037
CrossesCk
Location2.9 N of Verdon
RouteState Highway 37
Coordinates45.28216, -98.1044
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating63.1 US tons
Inventory rating37.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length106 ft (32.3 m)
Longest span38 ft (11.5 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic851 (2024)
Projected traffic1,128 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$80,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SD037 over Ck built?

It was built in 1955, making it 70 years old in 2025.

What condition is SD037 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 SD037 over Ck carry?

About 851 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is SD037 over Ck?

The structure is 106 ft (32.3 m) long with a longest span of 38 ft (11.5 m) and a deck 34 ft wide.

Who owns SD037 over Ck?

It is owned by the State Highway Agency.