US Bridges

443 Ramp-I 90 over Shiloh Interchange

Good

Yellowstone County, Montana · Billings · Structure no. I00090444+04433

Built
2001
24 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
329 ft
4 main spans
Daily traffic
2,504
2023 count
Owner
State
State Highway Agency

About this bridge

443 Ramp-I 90 over Shiloh Interchange is a prestressed concrete stringer/multi-beam or girder carrying 443 Ramp-I 90 over Shiloh Interchange in Yellowstone County, Montana. It was built in 2001, so it is 24 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 2,504 vehicles a day, roughly 3% of them trucks, projected to reach 2,654 by 2043. The structure is 329 ft (100.3 m) long and 41 ft wide.

Carries443 Ramp-I 90
CrossesShiloh Interchange
LocationBillings
RouteInterstate 90
StateMontana
Coordinates45.73274, -108.60347
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44 US tons
Inventory rating27 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4 (+1 approach)
Design loadHS 20
Structure length329 ft (100.3 m)
Longest span90 ft (27.4 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,504 (2023)
Projected traffic2,654 by 2043
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 443 Ramp-I 90 over Shiloh Interchange built?

It was built in 2001, making it 24 years old in 2025.

What condition is 443 Ramp-I 90 over Shiloh Interchange 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 April 2024.

How much traffic does 443 Ramp-I 90 over Shiloh Interchange carry?

About 2,504 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is 443 Ramp-I 90 over Shiloh Interchange?

The structure is 329 ft (100.3 m) long with a longest span of 90 ft (27.4 m) and a deck 41 ft wide.

Who owns 443 Ramp-I 90 over Shiloh Interchange?

It is owned by the State Highway Agency.