US Bridges

US014 B over I029

Fair

Brookings County, South Dakota · US14 By-Pass Interchange · Structure no. 000000006185150

Built
1966
59 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
254 ft
4 main spans
Daily traffic
2,585
2024 count
Owner
State
State Highway Agency

About this bridge

US014 B over I029 is a steel continuous stringer/multi-beam or girder carrying US014 B over I029 in Brookings County, South Dakota. It was built in 1966, so it is 59 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,585 vehicles a day, roughly 31% of them trucks, projected to reach 3,888 by 2044. The structure is 254 ft (77.4 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesUS014 B
CrossesI029
LocationUS14 By-Pass Interchange
RouteU.S. Route 14
CountyBrookings County
StateSouth Dakota
Coordinates44.3258, -96.75788
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating64 US tons
Inventory rating38.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length254 ft (77.4 m)
Longest span70 ft (21.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,585 (2024)
Projected traffic3,888 by 2044
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US014 B over I029 built?

It was built in 1966, making it 59 years old in 2025.

What condition is US014 B over I029 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does US014 B over I029 carry?

About 2,585 vehicles per day (2024 count), of which roughly 31% are trucks.

How long is US014 B over I029?

The structure is 254 ft (77.4 m) long with a longest span of 70 ft (21.3 m) and a deck 32 ft wide.

Who owns US014 B over I029?

It is owned by the State Highway Agency.