US Bridges

IRR - I 90 over Int Wyola-S 457

Fair

Big Horn County, Montana · Wyola · Structure no. I00090544+00071

Built
1985
40 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
131 ft
3 main spans
Daily traffic
2,193
2023 count
Owner
State
State Highway Agency

About this bridge

IRR - I 90 over Int Wyola-S 457 is a prestressed concrete stringer/multi-beam or girder carrying IRR - I 90 over Int Wyola-S 457 in Big Horn County, Montana. It was built in 1985, so it is 40 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 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 2,193 vehicles a day, roughly 22% of them trucks, projected to reach 2,346 by 2043. The structure is 131 ft (39.9 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesIRR - I 90
CrossesInt Wyola-S 457
LocationWyola
RouteInterstate 90
CountyBig Horn County
StateMontana
Coordinates45.13169, -107.36428
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length131 ft (39.9 m)
Longest span51 ft (15.5 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,193 (2023)
Projected traffic2,346 by 2043
Trucks22%
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 IRR - I 90 over Int Wyola-S 457 built?

It was built in 1985, making it 40 years old in 2025.

What condition is IRR - I 90 over Int Wyola-S 457 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 IRR - I 90 over Int Wyola-S 457 carry?

About 2,193 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is IRR - I 90 over Int Wyola-S 457?

The structure is 131 ft (39.9 m) long with a longest span of 51 ft (15.5 m) and a deck 40 ft wide.

Who owns IRR - I 90 over Int Wyola-S 457?

It is owned by the State Highway Agency.