US Bridges

280th Street over Beaver Creek

PoorPosted for load

Lincoln County, South Dakota · 2N & 1.2W of Canton · Structure no. 000000042147120

Built
1935
90 years old
Condition
Poor
inspected May 2024
Type
Slab
Concrete Continuous
Length
61 ft
4 main spans
Daily traffic
74
2022 count
Owner
County
County Highway Agency

About this bridge

280th Street over Beaver Creek is a concrete continuous slab carrying 280th Street over Beaver Creek in Lincoln County, South Dakota. It was built in 1935, so it is 90 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 74 vehicles a day, roughly 2% of them trucks, projected to reach 74 by 2032. The structure is 61 ft (18.5 m) long and 19 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries280th Street
CrossesBeaver Creek
Location2N & 1.2W of Canton
RouteCounty Highway 0
Coordinates43.32994, -96.63337
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating20.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length61 ft (18.5 m)
Longest span15 ft (4.6 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic74 (2022)
Projected traffic74 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.9 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 280th Street over Beaver Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is 280th Street over Beaver Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does 280th Street over Beaver Creek carry?

About 74 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 280th Street over Beaver Creek?

The structure is 61 ft (18.5 m) long with a longest span of 15 ft (4.6 m) and a deck 19 ft wide.

Who owns 280th Street over Beaver Creek?

It is owned by the County Highway Agency.