US Bridges

Bixby Road over Antelope Ck

Good

Perkins County, South Dakota · 5.7 W 15.3 S Bison · Structure no. 000000053190443

Built
1965
60 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete Continuous
Length
112 ft
3 main spans
Daily traffic
155
2022 count
Owner
County
County Highway Agency

About this bridge

Bixby Road over Antelope Ck is a concrete continuous slab carrying Bixby Road over Antelope Ck in Perkins County, South Dakota. It was built in 1965, so it is 60 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 155 vehicles a day, roughly 3% of them trucks, projected to reach 155 by 2032. The structure is 112 ft (34.1 m) long and 34 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesBixby Road
CrossesAntelope Ck
Location5.7 W 15.3 S Bison
RouteCounty Highway 0
Coordinates45.31289, -102.57003
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating25.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span42 ft (12.8 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic155 (2022)
Projected traffic155 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Bixby Road over Antelope Ck built?

It was built in 1965, making it 60 years old in 2025.

What condition is Bixby Road 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 May 2023.

How much traffic does Bixby Road over Antelope Ck carry?

About 155 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Bixby Road over Antelope Ck?

The structure is 112 ft (34.1 m) long with a longest span of 42 ft (12.8 m) and a deck 34 ft wide.

Who owns Bixby Road over Antelope Ck?

It is owned by the County Highway Agency.