NW1501 over Br of Knob CR
PoorClosed to trafficHenry County, Missouri · S 28 T 43 N R 28 W · Structure no. 13401
- Built
- 1940
- 85 years old
- Condition
- Poor
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 30 ft
- 1 main span
- Daily traffic
- 30
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
NW1501 over Br of Knob CR is a steel stringer/multi-beam or girder carrying NW1501 over Br of Knob CR in Henry County, Missouri. It was built in 1940, so it is 85 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: closed to all traffic.
It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 42 by 2043. The structure is 30 ft (9.1 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 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 NW1501 over Br of Knob CR built?
It was built in 1940, making it 85 years old in 2025.
What condition is NW1501 over Br of Knob CR 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 March 2023.
How much traffic does NW1501 over Br of Knob CR carry?
About 30 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is NW1501 over Br of Knob CR?
The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 16 ft wide.
Who owns NW1501 over Br of Knob CR?
It is owned by the County Highway Agency.