US Bridges

IRR US018 over Ck

Good

County 102, South Dakota · 2.3 E of Pine Ridge · Structure no. 000000057252473

Built
2016
9 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
36 ft
3 main spans
Daily traffic
3,597
2024 count
Owner
State
State Highway Agency

About this bridge

IRR US018 over Ck is a concrete culvert carrying IRR US018 over Ck in County 102, South Dakota. It was built in 2016, so it is 9 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 3,597 vehicles a day, roughly 4% of them trucks, projected to reach 4,788 by 2044. The structure is 36 ft (10.9 m) long. If it were closed, the detour would be 39.1 mi (63 km).

CarriesIRR US018
CrossesCk
Location2.3 E of Pine Ridge
RouteU.S. Route 18
Coordinates43.02741, -102.51094
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 protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2024
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 rating60.5 US tons
Inventory rating46.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length36 ft (10.9 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,597 (2024)
Projected traffic4,788 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.1 mi (63 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 IRR US018 over Ck built?

It was built in 2016, making it 9 years old in 2025.

What condition is IRR US018 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 December 2024.

How much traffic does IRR US018 over Ck carry?

About 3,597 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is IRR US018 over Ck?

The structure is 36 ft (10.9 m) long with a longest span of 11 ft (3.4 m).

Who owns IRR US018 over Ck?

It is owned by the State Highway Agency.