Old US 10 over Big Ditch 017
GoodStillwater County, Montana · 6M W Park City · Structure no. L48245011+05001
- Built
- 1955
- 70 years old
- Condition
- Good
- inspected January 2024
- Type
- Tee Beam
- Concrete
- Length
- 101 ft
- 3 main spans
- Daily traffic
- 1,617
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Old US 10 over Big Ditch 017 is a concrete tee beam carrying Old US 10 over Big Ditch 017 in Stillwater County, Montana. It was built in 1955, so it is 70 years old, older 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 1,617 vehicles a day, roughly 3% of them trucks, projected to reach 1,722 by 2043. The structure is 101 ft (30.8 m) long and 33 ft wide. If it were closed, the detour would be 36 mi (58 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old US 10 over Big Ditch 017 built?
It was built in 1955, making it 70 years old in 2025.
What condition is Old US 10 over Big Ditch 017 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 January 2024.
How much traffic does Old US 10 over Big Ditch 017 carry?
About 1,617 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Old US 10 over Big Ditch 017?
The structure is 101 ft (30.8 m) long with a longest span of 64 ft (19.5 m) and a deck 33 ft wide.
Who owns Old US 10 over Big Ditch 017?
It is owned by the State Highway Agency.