US Bridges

476th Avenue over S Fork of Beaver Creek

PoorPosted for load

Lincoln County, South Dakota · 1.8S & 4W of Canton · Structure no. 000000042120158

Built
1963
62 years old
Condition
Poor
inspected May 2023
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
117
2022 count
Owner
County
County Highway Agency

About this bridge

476th Avenue over S Fork of Beaver Creek is a concrete continuous slab carrying 476th Avenue over S Fork of Beaver Creek in Lincoln County, South Dakota. It was built in 1963, so it is 62 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 117 vehicles a day, roughly 3% of them trucks, projected to reach 253 by 2032. The structure is 80 ft (24.4 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries476th Avenue
CrossesS Fork of Beaver Creek
Location1.8S & 4W of Canton
RouteCounty Highway 0
Coordinates43.27451, -96.68758
Functional classRural Minor Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, 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 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23 US tons
Inventory rating13.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span30 ft (9.1 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic117 (2022)
Projected traffic253 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$735,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 476th Avenue over S Fork of Beaver Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is 476th Avenue over S Fork of 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 2023.

How much traffic does 476th Avenue over S Fork of Beaver Creek carry?

About 117 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 476th Avenue over S Fork of Beaver Creek?

The structure is 80 ft (24.4 m) long with a longest span of 30 ft (9.1 m) and a deck 34 ft wide.

Who owns 476th Avenue over S Fork of Beaver Creek?

It is owned by the County Highway Agency.