US Bridges

US014 over I029

Good

Brookings County, South Dakota · US 14 & I 29 Interchange · Structure no. 000000006185159

Built
2017
8 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
254 ft
2 main spans
Daily traffic
2,600
2023 count
Owner
State
State Highway Agency

About this bridge

US014 over I029 is a prestressed concrete stringer/multi-beam or girder carrying US014 over I029 in Brookings County, South Dakota. It was built in 2017, so it is 8 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 2,600 vehicles a day, roughly 14% of them trucks, projected to reach 3,601 by 2043. The structure is 254 ft (77.4 m) long and 88 ft wide.

CarriesUS014
CrossesI029
LocationUS 14 & I 29 Interchange
RouteU.S. Route 14
Coordinates44.31168, -96.75811
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating50.7 US tons
Inventory rating39.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length254 ft (77.4 m)
Longest span126 ft (38.4 m)
Deck width88 ft (26.9 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2023)
Projected traffic3,601 by 2043
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US014 over I029 built?

It was built in 2017, making it 8 years old in 2025.

What condition is US014 over I029 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 July 2023.

How much traffic does US014 over I029 carry?

About 2,600 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is US014 over I029?

The structure is 254 ft (77.4 m) long with a longest span of 126 ft (38.4 m) and a deck 88 ft wide.

Who owns US014 over I029?

It is owned by the State Highway Agency.