US Bridges

SD037 N over Lake Mitchell Spillway

Good

Davison County, South Dakota · 2.7 N JCT I 90 Loop · Structure no. 000000018151075

Built
2024
1 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
115 ft
1 main span
Daily traffic
2,396
2024 count
Owner
State
State Highway Agency

About this bridge

SD037 N over Lake Mitchell Spillway is a prestressed concrete stringer/multi-beam or girder carrying SD037 N over Lake Mitchell Spillway in Davison County, South Dakota. It was built in 2024, so it is 1 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,396 vehicles a day, roughly 7% of them trucks, projected to reach 3,390 by 2044. The structure is 115 ft (35.2 m) long and 67 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSD037 N
CrossesLake Mitchell Spillway
Location2.7 N JCT I 90 Loop
RouteState Highway 37
Coordinates43.74048, -98.02578
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.8 US tons
Inventory rating46.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length115 ft (35.2 m)
Longest span113 ft (34.4 m)
Deck width67 ft (20.5 m)
Roadway width65 ft (19.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,396 (2024)
Projected traffic3,390 by 2044
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SD037 N over Lake Mitchell Spillway built?

It was built in 2024, making it 1 years old in 2025.

What condition is SD037 N over Lake Mitchell Spillway 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 November 2024.

How much traffic does SD037 N over Lake Mitchell Spillway carry?

About 2,396 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is SD037 N over Lake Mitchell Spillway?

The structure is 115 ft (35.2 m) long with a longest span of 113 ft (34.4 m) and a deck 67 ft wide.

Who owns SD037 N over Lake Mitchell Spillway?

It is owned by the State Highway Agency.