US 12 over Ten Mile Creek
GoodLewis and Clark County, Montana · 5M W Helena · Structure no. P00008036+09441
- Built
- 1988
- 37 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 109 ft
- 1 main span
- Daily traffic
- 5,018
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Ten Mile Creek is a prestressed concrete stringer/multi-beam or girder carrying US 12 over Ten Mile Creek in Lewis and Clark County, Montana. It was built in 1988, so it is 37 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 5,018 vehicles a day, roughly 5% of them trucks, projected to reach 5,344 by 2043. The structure is 109 ft (33.1 m) long and 70 ft wide. If it were closed, the detour would be 69 mi (111 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 US 12 over Ten Mile Creek built?
It was built in 1988, making it 37 years old in 2025.
What condition is US 12 over Ten Mile Creek 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 May 2023.
How much traffic does US 12 over Ten Mile Creek carry?
About 5,018 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is US 12 over Ten Mile Creek?
The structure is 109 ft (33.1 m) long with a longest span of 105 ft (32 m) and a deck 70 ft wide.
Who owns US 12 over Ten Mile Creek?
It is owned by the State Highway Agency.