US Bridges

I090 E over Big Buffalo Ck

Good

Jackson County, South Dakota · 1.0 E Sd 240 S Interch · Structure no. 000000036135111

Built
1967
58 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
134 ft
3 main spans
Daily traffic
3,525
2024 count
Owner
State
State Highway Agency

About this bridge

I090 E over Big Buffalo Ck is a steel continuous stringer/multi-beam or girder carrying I090 E over Big Buffalo Ck in Jackson County, South Dakota. It was built in 1967, so it is 58 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 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 3,525 vehicles a day, roughly 28% of them trucks, projected to reach 4,956 by 2044. The structure is 134 ft (40.8 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI090 E
CrossesBig Buffalo Ck
Location1.0 E Sd 240 S Interch
RouteInterstate 90
Coordinates43.836, -101.86993
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating36.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length134 ft (40.8 m)
Longest span44 ft (13.4 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,525 (2024)
Projected traffic4,956 by 2044
Trucks28%
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 E over Big Buffalo Ck built?

It was built in 1967, making it 58 years old in 2025.

What condition is I090 E over Big Buffalo 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 March 2023.

How much traffic does I090 E over Big Buffalo Ck carry?

About 3,525 vehicles per day (2024 count), of which roughly 28% are trucks.

How long is I090 E over Big Buffalo Ck?

The structure is 134 ft (40.8 m) long with a longest span of 44 ft (13.4 m) and a deck 41 ft wide.

Who owns I090 E over Big Buffalo Ck?

It is owned by the State Highway Agency.