305th RD over Trib N Blackbird C
PoorPosted for loadPutnam County, Missouri · S 36 T 67 N R 19 W · Structure no. 16795
- Built
- 1915
- 110 years old
- Condition
- Poor
- inspected February 2023
- Type
- Truss - Thru
- Steel
- Length
- 40 ft
- 1 main span
- Daily traffic
- 5
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
305th RD over Trib N Blackbird C is a steel truss - thru carrying 305th RD over Trib N Blackbird C in Putnam County, Missouri. It was built in 1915, so it is 110 years old, older than the Missouri average of 45.1 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 40 ft (12.2 m) long and 13 ft wide. If it were closed, the detour would be 5 mi (8 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 305th RD over Trib N Blackbird C built?
It was built in 1915, making it 110 years old in 2025.
What condition is 305th RD over Trib N Blackbird C 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 February 2023.
How much traffic does 305th RD over Trib N Blackbird C carry?
About 5 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is 305th RD over Trib N Blackbird C?
The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 13 ft wide.
Who owns 305th RD over Trib N Blackbird C?
It is owned by the County Highway Agency.