US Bridges

I-90 over Yellowstone River

Fair

Yellowstone County, Montana · Billings · Structure no. 000000202301765

Built
2023
2 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
975 ft
6 main spans
Daily traffic
14,744
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Yellowstone River is a steel continuous stringer/multi-beam or girder carrying I-90 over Yellowstone River in Yellowstone County, Montana. It was built in 2023, so it is 2 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 14,744 vehicles a day, roughly 13% of them trucks, projected to reach 15,702 by 2043. The structure is 975 ft (297.2 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesYellowstone River
LocationBillings
RouteInterstate 90
CountyYellowstone County
StateMontana
Coordinates45.79269, -108.47138
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length975 ft (297.2 m)
Longest span180 ft (54.9 m)
Deck width58 ft (17.8 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,744 (2023)
Projected traffic15,702 by 2043
Trucks13%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-90 over Yellowstone River built?

It was built in 2023, making it 2 years old in 2025.

What condition is I-90 over Yellowstone River 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 August 2024.

How much traffic does I-90 over Yellowstone River carry?

About 14,744 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is I-90 over Yellowstone River?

The structure is 975 ft (297.2 m) long with a longest span of 180 ft (54.9 m) and a deck 58 ft wide.

Who owns I-90 over Yellowstone River?

It is owned by the State Highway Agency.