US Bridges

476th Avenue over Ck

Good

Brookings County, South Dakota · 0.6S & 2W White · Structure no. 000000006220081

Built
2001
24 years old
Condition
Good
inspected September 2023
Type
Tee Beam
Prestressed Concrete
Length
63 ft
1 main span
Daily traffic
92
2022 count
Owner
County
County Highway Agency

About this bridge

476th Avenue over Ck is a prestressed concrete tee beam carrying 476th Avenue over Ck in Brookings County, South Dakota. It was built in 2001, so it is 24 years old, younger 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 92 vehicles a day, roughly 3% of them trucks, projected to reach 105 by 2032. The structure is 63 ft (19.2 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries476th Avenue
CrossesCk
Location0.6S & 2W White
RouteCounty Highway 0
Coordinates44.42482, -96.68662
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length63 ft (19.2 m)
Longest span61 ft (18.7 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic92 (2022)
Projected traffic105 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 476th Avenue over Ck built?

It was built in 2001, making it 24 years old in 2025.

What condition is 476th Avenue over 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 September 2023.

How much traffic does 476th Avenue over Ck carry?

About 92 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 476th Avenue over Ck?

The structure is 63 ft (19.2 m) long with a longest span of 61 ft (18.7 m) and a deck 27 ft wide.

Who owns 476th Avenue over Ck?

It is owned by the County Highway Agency.