US Bridges

SD037 over I090

Fair

Davison County, South Dakota · Sd 37 N Interchange · Structure no. 000000018140107

Built
1966
59 years old, rebuilt 2004
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
254 ft
4 main spans
Daily traffic
10,351
2024 count
Owner
State
State Highway Agency

About this bridge

SD037 over I090 is a steel continuous stringer/multi-beam or girder carrying SD037 over I090 in Davison County, South Dakota. It was built in 1966 and reconstructed in 2004, 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 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 10,351 vehicles a day, roughly 5% of them trucks, projected to reach 14,647 by 2044. The structure is 254 ft (77.4 m) long and 51 ft wide.

CarriesSD037
CrossesI090
LocationSd 37 N Interchange
RouteState Highway 37
Coordinates43.69188, -98.04675
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating36 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length254 ft (77.4 m)
Longest span70 ft (21.3 m)
Deck width51 ft (15.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,351 (2024)
Projected traffic14,647 by 2044
Trucks5%
Lanes on structure3
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SD037 over I090 built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2004.

What condition is SD037 over I090 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 December 2024.

How much traffic does SD037 over I090 carry?

About 10,351 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is SD037 over I090?

The structure is 254 ft (77.4 m) long with a longest span of 70 ft (21.3 m) and a deck 51 ft wide.

Who owns SD037 over I090?

It is owned by the State Highway Agency.