US Bridges

I029 over Ck

Good

Union County, South Dakota · 5.6 N Sd 48 Interch · Structure no. 000000064006104

Built
1961
64 years old
Condition
Good
inspected September 2021
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
11,970
2023 count
Owner
State
State Highway Agency

About this bridge

I029 over Ck is a concrete continuous culvert carrying I029 over Ck in Union County, South Dakota. It was built in 1961, so it is 64 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,970 vehicles a day, roughly 24% of them trucks, projected to reach 17,248 by 2043. The structure is 29 ft (8.9 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI029
CrossesCk
Location5.6 N Sd 48 Interch
RouteInterstate 29
Coordinates42.93305, -96.79481
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.5 US tons
Inventory rating54.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length29 ft (8.9 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,970 (2023)
Projected traffic17,248 by 2043
Trucks24%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 I029 over Ck built?

It was built in 1961, making it 64 years old in 2025.

What condition is I029 over Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2021.

How much traffic does I029 over Ck carry?

About 11,970 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I029 over Ck?

The structure is 29 ft (8.9 m) long with a longest span of 14 ft (4.3 m).

Who owns I029 over Ck?

It is owned by the State Highway Agency.