Mo 13 N over Otter CR
PoorSt. Clair County, Missouri · S 2 T 39 N R 26 W · Structure no. 11913
- Built
- 1963
- 62 years old
- Condition
- Poor
- inspected September 2024
- Type
- Slab
- Concrete Continuous
- Length
- 84 ft
- 3 main spans
- Daily traffic
- 8,984
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 13 N over Otter CR is a concrete continuous slab carrying Mo 13 N over Otter CR in St. Clair County, Missouri. It was built in 1963, so it is 62 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 3 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 8,984 vehicles a day, roughly 32% of them trucks, projected to reach 15,722 by 2044. The structure is 84 ft (25.6 m) long and 31 ft wide. If it were closed, the detour would be 26.1 mi (42 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 13 N over Otter CR built?
It was built in 1963, making it 62 years old in 2025.
What condition is Mo 13 N over Otter 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 September 2024.
How much traffic does Mo 13 N over Otter CR carry?
About 8,984 vehicles per day (2024 count), of which roughly 32% are trucks.
How long is Mo 13 N over Otter CR?
The structure is 84 ft (25.6 m) long with a longest span of 28 ft (8.6 m) and a deck 31 ft wide.
Who owns Mo 13 N over Otter CR?
It is owned by the State Highway Agency.