US 12 over Prickly Pear Creek
GoodLewis and Clark County, Montana · East Helena · Structure no. P00008049+03341
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 77 ft
- 1 main span
- Daily traffic
- 15,333
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Prickly Pear Creek is a prestressed concrete stringer/multi-beam or girder carrying US 12 over Prickly Pear Creek in Lewis and Clark County, Montana. It was built in 1978, so it is 47 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 15,333 vehicles a day, roughly 2% of them trucks, projected to reach 16,100 by 2043. The structure is 77 ft (23.5 m) long and 94 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over Prickly Pear Creek built?
It was built in 1978, making it 47 years old in 2025.
What condition is US 12 over Prickly Pear 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 November 2024.
How much traffic does US 12 over Prickly Pear Creek carry?
About 15,333 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is US 12 over Prickly Pear Creek?
The structure is 77 ft (23.5 m) long with a longest span of 75 ft (22.9 m) and a deck 94 ft wide.
Who owns US 12 over Prickly Pear Creek?
It is owned by the State Highway Agency.