US Bridges

481st Avenue over Beaver Creek

Fair

Lincoln County, South Dakota · 1.6S of Canton · Structure no. 000000042170155

Built
1959
66 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
129 ft
5 main spans
Daily traffic
435
2022 count
Owner
County
County Highway Agency

About this bridge

481st Avenue over Beaver Creek is a concrete continuous slab carrying 481st Avenue over Beaver Creek in Lincoln County, South Dakota. It was built in 1959, so it is 66 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 435 vehicles a day, roughly 3% of them trucks, projected to reach 435 by 2032. The structure is 129 ft (39.2 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries481st Avenue
CrossesBeaver Creek
Location1.6S of Canton
RouteCounty Highway 0
Coordinates43.27896, -96.58806
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41 US tons
Inventory rating24.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length129 ft (39.2 m)
Longest span28 ft (8.4 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic435 (2022)
Projected traffic435 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 481st Avenue over Beaver Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is 481st Avenue over Beaver Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does 481st Avenue over Beaver Creek carry?

About 435 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 481st Avenue over Beaver Creek?

The structure is 129 ft (39.2 m) long with a longest span of 28 ft (8.4 m) and a deck 32 ft wide.

Who owns 481st Avenue over Beaver Creek?

It is owned by the County Highway Agency.