US Bridges

US012 W over Burlington Northern RR

Fair

Brown County, South Dakota · 3.2 W JCT Sd 37 · Structure no. 000000007267329

Built
1975
50 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
830 ft
8 main spans
Daily traffic
2,878
2024 count
Owner
State
State Highway Agency

About this bridge

US012 W over Burlington Northern RR is a steel continuous stringer/multi-beam or girder carrying US012 W over Burlington Northern RR in Brown County, South Dakota. It was built in 1975, so it is 50 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 2,878 vehicles a day, roughly 17% of them trucks, projected to reach 3,816 by 2044. The structure is 830 ft (253.1 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS012 W
CrossesBurlington Northern RR
Location3.2 W JCT Sd 37
RouteU.S. Route 12
CountyBrown County
StateSouth Dakota
Coordinates45.45831, -98.1702
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating51.6 US tons
Inventory rating30.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length830 ft (253.1 m)
Longest span120 ft (36.6 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,878 (2024)
Projected traffic3,816 by 2044
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 km)
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$350,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was US012 W over Burlington Northern RR built?

It was built in 1975, making it 50 years old in 2025.

What condition is US012 W over Burlington Northern RR 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 2024.

How much traffic does US012 W over Burlington Northern RR carry?

About 2,878 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is US012 W over Burlington Northern RR?

The structure is 830 ft (253.1 m) long with a longest span of 120 ft (36.6 m) and a deck 43 ft wide.

Who owns US012 W over Burlington Northern RR?

It is owned by the State Highway Agency.