US Bridges

I 90 over Int Hopper

Fair

Park County, Montana · 8.7M W Livingston · Structure no. I00090324+06051

Built
1978
47 years old, rebuilt 2008
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
126 ft
3 main spans
Daily traffic
8,236
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 over Int Hopper is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Int Hopper in Park County, Montana. It was built in 1978 and reconstructed in 2008, so it is 47 years old, younger 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 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 8,236 vehicles a day, roughly 16% of them trucks, projected to reach 8,976 by 2043. The structure is 126 ft (38.4 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesI 90
CrossesInt Hopper
Location8.7M W Livingston
RouteInterstate 90
CountyPark County
StateMontana
Coordinates45.66185, -110.73969
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,236 (2023)
Projected traffic8,976 by 2043
Trucks16%
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 over Int Hopper built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2008.

What condition is I 90 over Int Hopper 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 January 2025.

How much traffic does I 90 over Int Hopper carry?

About 8,236 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I 90 over Int Hopper?

The structure is 126 ft (38.4 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns I 90 over Int Hopper?

It is owned by the State Highway Agency.