Southwest Ave over UP RR
PoorPosted for loadSt. Louis city, Missouri · S 2037 T 45 N R 6 E · Structure no. 12883
- Built
- 1961
- 64 years old
- Condition
- Poor
- inspected March 2024
- Type
- Slab
- Concrete Continuous
- Length
- 123 ft
- 3 main spans
- Daily traffic
- 10,460
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Southwest Ave over UP RR is a concrete continuous slab carrying Southwest Ave over UP RR in St. Louis city, Missouri. It was built in 1961, so it is 64 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. Its operating status is: posted for load restriction.
It carries about 10,460 vehicles a day, roughly 5% of them trucks, projected to reach 14,121 by 2043. The structure is 123 ft (37.5 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Southwest Ave over UP RR built?
It was built in 1961, making it 64 years old in 2025.
What condition is Southwest Ave over UP RR 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 2024.
How much traffic does Southwest Ave over UP RR carry?
About 10,460 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Southwest Ave over UP RR?
The structure is 123 ft (37.5 m) long with a longest span of 34 ft (10.4 m) and a deck 80 ft wide.
Who owns Southwest Ave over UP RR?
It is owned by the City or Municipal Highway Agency.