US Bridges

I 90 over Int W Laurel-Rr

Good

Yellowstone County, Montana · Laurel · Structure no. 000000201901742

Built
2019
6 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
473 ft
3 main spans
Daily traffic
9,599
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 over Int W Laurel-Rr is a steel continuous stringer/multi-beam or girder carrying I 90 over Int W Laurel-Rr in Yellowstone County, Montana. It was built in 2019, so it is 6 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,599 vehicles a day, roughly 13% of them trucks, projected to reach 10,463 by 2043. The structure is 473 ft (144.2 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI 90
CrossesInt W Laurel-Rr
LocationLaurel
RouteInterstate 90
CountyYellowstone County
StateMontana
Coordinates45.66404, -108.78963
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.1 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length473 ft (144.2 m)
Longest span170 ft (51.8 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,599 (2023)
Projected traffic10,463 by 2043
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.1 mi (5 km)
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 W Laurel-Rr built?

It was built in 2019, making it 6 years old in 2025.

What condition is I 90 over Int W Laurel-Rr in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does I 90 over Int W Laurel-Rr carry?

About 9,599 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is I 90 over Int W Laurel-Rr?

The structure is 473 ft (144.2 m) long with a longest span of 170 ft (51.8 m) and a deck 46 ft wide.

Who owns I 90 over Int W Laurel-Rr?

It is owned by the State Highway Agency.