US Bridges

IRR US018 over Ck

Good

County 102, South Dakota · 5.8 NW of Pine Ridge · Structure no. 000000057204425

Built
2011
14 years old
Condition
Good
inspected August 2021
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
2,131
2024 count
Owner
State
State Highway Agency

About this bridge

IRR US018 over Ck is a concrete continuous culvert carrying IRR US018 over Ck in County 102, South Dakota. It was built in 2011, so it is 14 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 2,131 vehicles a day, roughly 5% of them trucks, projected to reach 2,836 by 2044. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 39.8 mi (64 km).

CarriesIRR US018
CrossesCk
Location5.8 NW of Pine Ridge
RouteU.S. Route 18
Coordinates43.09635, -102.60617
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 protection9 ExcellentNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating45 US tons
Inventory rating34.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length23 ft (6.9 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 traffic2,131 (2024)
Projected traffic2,836 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 2011, making it 14 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 August 2021.

How much traffic does IRR US018 over Ck carry?

About 2,131 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is IRR US018 over Ck?

The structure is 23 ft (6.9 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.