Gibson RD over Rock Creek 029
FairCarbon County, Montana · 1M E Rockvale · Structure no. L05304001+07001
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected September 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 139 ft
- 2 main spans
- Daily traffic
- 31
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Gibson RD over Rock Creek 029 is a prestressed concrete tee beam carrying Gibson RD over Rock Creek 029 in Carbon County, Montana. It was built in 1979, so it is 46 years old, younger 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 31 vehicles a day, roughly 3% of them trucks, projected to reach 33 by 2043. The structure is 139 ft (42.4 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Gibson RD over Rock Creek 029 built?
It was built in 1979, making it 46 years old in 2025.
What condition is Gibson RD over Rock Creek 029 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 September 2023.
How much traffic does Gibson RD over Rock Creek 029 carry?
About 31 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Gibson RD over Rock Creek 029?
The structure is 139 ft (42.4 m) long with a longest span of 68 ft (20.7 m) and a deck 26 ft wide.
Who owns Gibson RD over Rock Creek 029?
It is owned by the County Highway Agency.