US Bridges

I090 W over Split Rock Ck

Good

Minnehaha County, South Dakota · 0.4 E Sd 11 Interch · Structure no. 000000050284165

Built
2018
7 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
379 ft
4 main spans
Daily traffic
12,279
2024 count
Owner
State
State Highway Agency

About this bridge

I090 W over Split Rock Ck is a prestressed concrete stringer/multi-beam or girder carrying I090 W over Split Rock Ck in Minnehaha County, South Dakota. It was built in 2018, so it is 7 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 12,279 vehicles a day, roughly 14% of them trucks, projected to reach 19,352 by 2044. The structure is 379 ft (115.4 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI090 W
CrossesSplit Rock Ck
Location0.4 E Sd 11 Interch
RouteInterstate 90
Coordinates43.60864, -96.56307
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating71.7 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length379 ft (115.4 m)
Longest span98 ft (29.9 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,279 (2024)
Projected traffic19,352 by 2044
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I090 W over Split Rock Ck built?

It was built in 2018, making it 7 years old in 2025.

What condition is I090 W over Split Rock Ck 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 September 2023.

How much traffic does I090 W over Split Rock Ck carry?

About 12,279 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I090 W over Split Rock Ck?

The structure is 379 ft (115.4 m) long with a longest span of 98 ft (29.9 m) and a deck 43 ft wide.

Who owns I090 W over Split Rock Ck?

It is owned by the State Highway Agency.