US Bridges

I 90 over Int Cardwell-S 359

Fair

Jefferson County, Montana · Cardwell · Structure no. I00090256+02931

Built
1968
57 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
139 ft
3 main spans
Daily traffic
5,599
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 over Int Cardwell-S 359 is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Int Cardwell-S 359 in Jefferson County, Montana. It was built in 1968, so it is 57 years old, older than the Montana average of 47 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 5,599 vehicles a day, roughly 18% of them trucks, projected to reach 6,214 by 2043. The structure is 139 ft (42.4 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesI 90
CrossesInt Cardwell-S 359
LocationCardwell
RouteInterstate 90
CountyJefferson County
StateMontana
Coordinates45.86969, -111.95458
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span57 ft (17.4 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,599 (2023)
Projected traffic6,214 by 2043
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 over Int Cardwell-S 359 built?

It was built in 1968, making it 57 years old in 2025.

What condition is I 90 over Int Cardwell-S 359 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 December 2023.

How much traffic does I 90 over Int Cardwell-S 359 carry?

About 5,599 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I 90 over Int Cardwell-S 359?

The structure is 139 ft (42.4 m) long with a longest span of 57 ft (17.4 m) and a deck 41 ft wide.

Who owns I 90 over Int Cardwell-S 359?

It is owned by the State Highway Agency.