Birdtail RD over Flat Creek 036
PoorPosted for loadLewis and Clark County, Montana · 8M SE Bowmans · Structure no. L25320003+09001
- Built
- 1901
- 124 years old
- Condition
- Poor
- inspected July 2024
- Type
- Truss - Thru
- Steel
- Length
- 61 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Birdtail RD over Flat Creek 036 is a steel truss - thru carrying Birdtail RD over Flat Creek 036 in Lewis and Clark County, Montana. It was built in 1901, so it is 124 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 61 ft (18.6 m) long and 16 ft wide. If it were closed, the detour would be 62.1 mi (100 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Birdtail RD over Flat Creek 036 built?
It was built in 1901, making it 124 years old in 2025.
What condition is Birdtail RD over Flat Creek 036 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 July 2024.
How much traffic does Birdtail RD over Flat Creek 036 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Birdtail RD over Flat Creek 036?
The structure is 61 ft (18.6 m) long with a longest span of 59 ft (18 m) and a deck 16 ft wide.
Who owns Birdtail RD over Flat Creek 036?
It is owned by the County Highway Agency.