US 212 over Rock Creek
FairCarbon County, Montana · 1M W Joliet · Structure no. P00028094+03641
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 164 ft
- 2 main spans
- Daily traffic
- 3,817
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 212 over Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying US 212 over Rock Creek in Carbon County, Montana. It was built in 1974, so it is 51 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 5 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 3,817 vehicles a day, roughly 2% of them trucks, projected to reach 4,008 by 2043. The structure is 164 ft (50 m) long and 45 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 212 over Rock Creek built?
It was built in 1974, making it 51 years old in 2025.
What condition is US 212 over Rock Creek 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 May 2024.
How much traffic does US 212 over Rock Creek carry?
About 3,817 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is US 212 over Rock Creek?
The structure is 164 ft (50 m) long with a longest span of 81 ft (24.7 m) and a deck 45 ft wide.
Who owns US 212 over Rock Creek?
It is owned by the State Highway Agency.