US Bridges

US083 over Antelope Ck

Good

Lyman County, South Dakota · 0.5 S Stanley CO Line · Structure no. 000000043009005

Built
2004
21 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
2,470
2023 count
Owner
State
State Highway Agency

About this bridge

US083 over Antelope Ck is a concrete continuous culvert carrying US083 over Antelope Ck in Lyman County, South Dakota. It was built in 2004, so it is 21 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 2,470 vehicles a day, roughly 16% of them trucks, projected to reach 4,118 by 2043. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 46 mi (74 km).

CarriesUS083
CrossesAntelope Ck
Location0.5 S Stanley CO Line
RouteU.S. Route 83
Coordinates44.18738, -100.34761
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 inspectionMarch 2023
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 rating40.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length21 ft (6.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,470 (2023)
Projected traffic4,118 by 2043
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed46 mi (74 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 US083 over Antelope Ck built?

It was built in 2004, making it 21 years old in 2025.

What condition is US083 over Antelope 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 March 2023.

How much traffic does US083 over Antelope Ck carry?

About 2,470 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US083 over Antelope Ck?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m).

Who owns US083 over Antelope Ck?

It is owned by the State Highway Agency.