US Bridges

I090 WB on Ramp over I090

Fair

Pennington County, South Dakota · 2.0 E US 16 B Interchange · Structure no. 000000052467276

Built
1963
62 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
354 ft
4 main spans
Daily traffic
6,028
2023 count
Owner
State
State Highway Agency

About this bridge

I090 WB on Ramp over I090 is a steel continuous stringer/multi-beam or girder carrying I090 WB on Ramp over I090 in Pennington County, South Dakota. It was built in 1963, so it is 62 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 5 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 6,028 vehicles a day, roughly 10% of them trucks, projected to reach 8,735 by 2043. The structure is 354 ft (108 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesI090 WB on Ramp
CrossesI090
Location2.0 E US 16 B Interchange
RouteInterstate 90
CountyPennington County
StateSouth Dakota
Coordinates44.11529, -103.11636
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.3 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length354 ft (108 m)
Longest span107 ft (32.6 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,028 (2023)
Projected traffic8,735 by 2043
Trucks10%
Lanes on structure2
Traffic directionOne-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 I090 WB on Ramp over I090 built?

It was built in 1963, making it 62 years old in 2025.

What condition is I090 WB on Ramp 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 February 2024.

How much traffic does I090 WB on Ramp over I090 carry?

About 6,028 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I090 WB on Ramp over I090?

The structure is 354 ft (108 m) long with a longest span of 107 ft (32.6 m) and a deck 32 ft wide.

Who owns I090 WB on Ramp over I090?

It is owned by the State Highway Agency.