US Bridges

SD020 over South Fork Yellow Bank R

Good

Grant County, South Dakota · 6.3 S JCT Sd 158 · Structure no. 000000026290213

Built
2021
4 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
1,284
2024 count
Owner
State
State Highway Agency

About this bridge

SD020 over South Fork Yellow Bank R is a concrete continuous culvert carrying SD020 over South Fork Yellow Bank R in Grant County, South Dakota. It was built in 2021, so it is 4 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 1,284 vehicles a day, roughly 28% of them trucks, projected to reach 1,754 by 2044. The structure is 38 ft (11.5 m) long. If it were closed, the detour would be 62.1 mi (100 km).

CarriesSD020
CrossesSouth Fork Yellow Bank R
Location6.3 S JCT Sd 158
RouteState Highway 20
Coordinates45.01589, -96.63866
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHL 93
Structure length38 ft (11.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,284 (2024)
Projected traffic1,754 by 2044
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SD020 over South Fork Yellow Bank R built?

It was built in 2021, making it 4 years old in 2025.

What condition is SD020 over South Fork Yellow Bank R 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 November 2024.

How much traffic does SD020 over South Fork Yellow Bank R carry?

About 1,284 vehicles per day (2024 count), of which roughly 28% are trucks.

How long is SD020 over South Fork Yellow Bank R?

The structure is 38 ft (11.5 m) long with a longest span of 12 ft (3.7 m).

Who owns SD020 over South Fork Yellow Bank R?

It is owned by the State Highway Agency.