US Bridges

US081 over Ck

Good

Lake County, South Dakota · 4.5 W JCT US 81 N · Structure no. 000000040077128

Built
1997
28 years old
Condition
Good
inspected October 2021
Type
Culvert
Concrete Continuous
Length
37 ft
3 main spans
Daily traffic
1,811
2024 count
Owner
State
State Highway Agency

About this bridge

US081 over Ck is a concrete continuous culvert carrying US081 over Ck in Lake County, South Dakota. It was built in 1997, so it is 28 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,811 vehicles a day, roughly 16% of them trucks, projected to reach 2,950 by 2044. The structure is 37 ft (11.4 m) long. If it were closed, the detour would be 55.3 mi (89 km).

CarriesUS081
CrossesCk
Location4.5 W JCT US 81 N
RouteU.S. Route 81
Coordinates44.00992, -97.2166
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating99 US tons
Inventory rating42.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length37 ft (11.4 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,811 (2024)
Projected traffic2,950 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.3 mi (89 km)
TollOn a free road
National Highway SystemYes

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 US081 over Ck built?

It was built in 1997, making it 28 years old in 2025.

What condition is US081 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 October 2021.

How much traffic does US081 over Ck carry?

About 1,811 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is US081 over Ck?

The structure is 37 ft (11.4 m) long with a longest span of 12 ft (3.7 m).

Who owns US081 over Ck?

It is owned by the State Highway Agency.