US Bridges

476 Avenue over Ck

Poor

Grant County, South Dakota · 4E & 3.1S Strandburg · Structure no. 000000026270221

Built
1930
95 years old
Condition
Poor
inspected September 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
27
2022 count
Owner
County
County Highway Agency

About this bridge

476 Avenue over Ck is a concrete continuous culvert carrying 476 Avenue over Ck in Grant County, South Dakota. It was built in 1930, so it is 95 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.

It carries about 27 vehicles a day, roughly 2% of them trucks, projected to reach 27 by 2032. The structure is 22 ft (6.8 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries476 Avenue
CrossesCk
Location4E & 3.1S Strandburg
RouteCounty Highway 0
Coordinates45.00444, -96.67971
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
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32 US tons
Inventory rating24 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.8 m)
Longest span11 ft (3.3 m)
Deck width31 ft (9.5 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27 (2022)
Projected traffic27 by 2032
Trucks2%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$250,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 476 Avenue over Ck built?

It was built in 1930, making it 95 years old in 2025.

What condition is 476 Avenue over Ck 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 September 2024.

How much traffic does 476 Avenue over Ck carry?

About 27 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 476 Avenue over Ck?

The structure is 22 ft (6.8 m) long with a longest span of 11 ft (3.3 m) and a deck 31 ft wide.

Who owns 476 Avenue over Ck?

It is owned by the County Highway Agency.