Mo 9 N over US 69
PoorPlatte County, Missouri · S 4 T 50 N R 33 W · Structure no. 1701
- Built
- 1969
- 56 years old, rebuilt 1989
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 136 ft
- 3 main spans
- Daily traffic
- 6,545
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 9 N over US 69 is a steel continuous stringer/multi-beam or girder carrying Mo 9 N over US 69 in Platte County, Missouri. It was built in 1969 and reconstructed in 1989, so it is 56 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.
It carries about 6,545 vehicles a day, roughly 3% of them trucks, projected to reach 13,417 by 2044. The structure is 136 ft (41.5 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 9 N over US 69 built?
It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1989.
What condition is Mo 9 N over US 69 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 October 2024.
How much traffic does Mo 9 N over US 69 carry?
About 6,545 vehicles per day (2024 count), of which roughly 3% are trucks.
How long is Mo 9 N over US 69?
The structure is 136 ft (41.5 m) long with a longest span of 56 ft (17.1 m) and a deck 41 ft wide.
Who owns Mo 9 N over US 69?
It is owned by the State Highway Agency.