US Bridges

Sanborn ST (SD37) over BNSF RR

Fair

Davison County, South Dakota · 0.4N JCTI90 Loop Mitchell · Structure no. 000000018149095

Built
2001
24 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
199 ft
3 main spans
Daily traffic
13,545
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sanborn ST (SD37) over BNSF RR is a steel continuous stringer/multi-beam or girder carrying Sanborn ST (SD37) over BNSF RR in Davison County, South Dakota. It was built in 2001, so it is 24 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 fair condition with a lowest component rating of 6 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 13,545 vehicles a day, roughly 3% of them trucks, projected to reach 15,700 by 2032. The structure is 199 ft (60.7 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSanborn ST (SD37)
CrossesBNSF RR
Location0.4N JCTI90 Loop Mitchell
RouteCity Street 0
CountyDavison County
StateSouth Dakota
Coordinates43.70839, -98.02964
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.4 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length199 ft (60.7 m)
Longest span90 ft (27.4 m)
Deck width63 ft (19.3 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,545 (2022)
Projected traffic15,700 by 2032
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Sanborn ST (SD37) over BNSF RR built?

It was built in 2001, making it 24 years old in 2025.

What condition is Sanborn ST (SD37) over BNSF 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 April 2023.

How much traffic does Sanborn ST (SD37) over BNSF RR carry?

About 13,545 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Sanborn ST (SD37) over BNSF RR?

The structure is 199 ft (60.7 m) long with a longest span of 90 ft (27.4 m) and a deck 63 ft wide.

Who owns Sanborn ST (SD37) over BNSF RR?

It is owned by the City or Municipal Highway Agency.