US Bridges

SD015 over Trib N Fork Yellow Bank

Good

Grant County, South Dakota · 2.8 S JCT US 12 · Structure no. 000000026290101

Built
2022
3 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
1,961
2023 count
Owner
State
State Highway Agency

About this bridge

SD015 over Trib N Fork Yellow Bank is a concrete culvert carrying SD015 over Trib N Fork Yellow Bank in Grant County, South Dakota. It was built in 2022, so it is 3 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 1,961 vehicles a day, roughly 13% of them trucks, projected to reach 2,679 by 2043. The structure is 21 ft (6.3 m) long and 40 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesSD015
CrossesTrib N Fork Yellow Bank
Location2.8 S JCT US 12
RouteState Highway 15
Coordinates45.17783, -96.64042
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 protection8 Very GoodNo problems noted.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length21 ft (6.3 m)
Longest span10 ft (3 m)
Deck width40 ft (12.2 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,961 (2023)
Projected traffic2,679 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 SD015 over Trib N Fork Yellow Bank built?

It was built in 2022, making it 3 years old in 2025.

What condition is SD015 over Trib N Fork Yellow Bank 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 SD015 over Trib N Fork Yellow Bank carry?

About 1,961 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is SD015 over Trib N Fork Yellow Bank?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m) and a deck 40 ft wide.

Who owns SD015 over Trib N Fork Yellow Bank?

It is owned by the State Highway Agency.