US Bridges

IRR US018 over Wounded Knee Ck

Good

County 102, South Dakota · 4.8 W JCT Sd 391 · Structure no. 000000057353458

Built
2017
8 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
1,170
2024 count
Owner
State
State Highway Agency

About this bridge

IRR US018 over Wounded Knee Ck is a concrete culvert carrying IRR US018 over Wounded Knee Ck in County 102, South Dakota. It was built in 2017, so it is 8 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 1,170 vehicles a day, roughly 7% of them trucks, projected to reach 1,557 by 2044. The structure is 25 ft (7.5 m) long. If it were closed, the detour would be 39.1 mi (63 km).

CarriesIRR US018
CrossesWounded Knee Ck
Location4.8 W JCT Sd 391
RouteU.S. Route 18
Coordinates43.04875, -102.31178
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 inspectionAugust 2023
Inspection intervalevery 24 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 alignment9: Superior to present desirable criteria
Operating rating45.7 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length25 ft (7.5 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 traffic1,170 (2024)
Projected traffic1,557 by 2044
Trucks7%
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 Wounded Knee Ck built?

It was built in 2017, making it 8 years old in 2025.

What condition is IRR US018 over Wounded Knee 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 2023.

How much traffic does IRR US018 over Wounded Knee Ck carry?

About 1,170 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is IRR US018 over Wounded Knee Ck?

The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.7 m).

Who owns IRR US018 over Wounded Knee Ck?

It is owned by the State Highway Agency.