County Road 105 over W Blacktail Creek 007
PoorPosted for loadRosebud County, Montana · 6M NE Ingomar · Structure no. L44105006+02001
- Built
- 1940
- 85 years old
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 32 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
County Road 105 over W Blacktail Creek 007 is a steel stringer/multi-beam or girder carrying County Road 105 over W Blacktail Creek 007 in Rosebud County, Montana. It was built in 1940, so it is 85 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 32 ft (9.9 m) long and 18 ft wide. If it were closed, the detour would be 21.1 mi (34 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 County Road 105 over W Blacktail Creek 007 built?
It was built in 1940, making it 85 years old in 2025.
What condition is County Road 105 over W Blacktail Creek 007 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.
How much traffic does County Road 105 over W Blacktail Creek 007 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is County Road 105 over W Blacktail Creek 007?
The structure is 32 ft (9.9 m) long with a longest span of 30 ft (9.2 m) and a deck 18 ft wide.
Who owns County Road 105 over W Blacktail Creek 007?
It is owned by the County Highway Agency.