US Bridges

I090 E over Trib to Willow Ck

Fair

Minnehaha County, South Dakota · 1.9 W I 29 Interch · Structure no. 000000050163166

Built
1961
64 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
67 ft
3 main spans
Daily traffic
8,815
2024 count
Owner
State
State Highway Agency

About this bridge

I090 E over Trib to Willow Ck is a concrete continuous slab carrying I090 E over Trib to Willow Ck in Minnehaha County, South Dakota. It was built in 1961, so it is 64 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 8,815 vehicles a day, roughly 19% of them trucks, projected to reach 13,267 by 2044. The structure is 67 ft (20.5 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI090 E
CrossesTrib to Willow Ck
Location1.9 W I 29 Interch
RouteInterstate 90
Coordinates43.60858, -96.80554
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length67 ft (20.5 m)
Longest span23 ft (7 m)
Deck width42 ft (12.9 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,815 (2024)
Projected traffic13,267 by 2044
Trucks19%
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 Trib to Willow Ck built?

It was built in 1961, making it 64 years old in 2025.

What condition is I090 E over Trib to Willow Ck 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 May 2024.

How much traffic does I090 E over Trib to Willow Ck carry?

About 8,815 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is I090 E over Trib to Willow Ck?

The structure is 67 ft (20.5 m) long with a longest span of 23 ft (7 m) and a deck 42 ft wide.

Who owns I090 E over Trib to Willow Ck?

It is owned by the State Highway Agency.