I 94 over Int Custer-S 310
FairYellowstone County, Montana · Custer · Structure no. I00094047+02181
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 76 ft
- 1 main span
- Daily traffic
- 2,406
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 94 over Int Custer-S 310 is a prestressed concrete stringer/multi-beam or girder carrying I 94 over Int Custer-S 310 in Yellowstone County, Montana. It was built in 1973, so it is 52 years old, older 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 2,406 vehicles a day, roughly 28% of them trucks, projected to reach 2,526 by 2043. The structure is 76 ft (23.2 m) long and 44 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 94 over Int Custer-S 310 built?
It was built in 1973, making it 52 years old in 2025.
What condition is I 94 over Int Custer-S 310 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 March 2024.
How much traffic does I 94 over Int Custer-S 310 carry?
About 2,406 vehicles per day (2023 count), of which roughly 28% are trucks.
How long is I 94 over Int Custer-S 310?
The structure is 76 ft (23.2 m) long with a longest span of 75 ft (22.9 m) and a deck 44 ft wide.
Who owns I 94 over Int Custer-S 310?
It is owned by the State Highway Agency.