US Bridges

I90 Wf (offett St) over Boxelder Ck

Fair

Pennington County, South Dakota · 1.6 E Elk Vale RD Interch · Structure no. 000000052462279

Built
1953
72 years old, rebuilt 1962
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
166 ft
3 main spans
Daily traffic
6,684
2023 count
Owner
State
State Highway Agency

About this bridge

I90 Wf (offett St) over Boxelder Ck is a steel continuous stringer/multi-beam or girder carrying I90 Wf (offett St) over Boxelder Ck in Pennington County, South Dakota. It was built in 1953 and reconstructed in 1962, so it is 72 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 6,684 vehicles a day, roughly 1% of them trucks, projected to reach 6,684 by 2043. The structure is 166 ft (50.7 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesI90 Wf (offett St)
CrossesBoxelder Ck
Location1.6 E Elk Vale RD Interch
RouteInterstate 90
CountyPennington County
StateSouth Dakota
Coordinates44.11158, -103.12443
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.7 US tons
Inventory rating29.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length166 ft (50.7 m)
Longest span64 ft (19.5 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,684 (2023)
Projected traffic6,684 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$830,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I90 Wf (offett St) over Boxelder Ck built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1962.

What condition is I90 Wf (offett St) over Boxelder 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 September 2024.

How much traffic does I90 Wf (offett St) over Boxelder Ck carry?

About 6,684 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is I90 Wf (offett St) over Boxelder Ck?

The structure is 166 ft (50.7 m) long with a longest span of 64 ft (19.5 m) and a deck 32 ft wide.

Who owns I90 Wf (offett St) over Boxelder Ck?

It is owned by the State Highway Agency.