Allenton RD over UP RR
PoorClosed to trafficSt. Louis County, Missouri · S 34 T 44 N R 3 E · Structure no. 16891
- Built
- 1928
- 97 years old
- Condition
- Poor
- inspected November 2024
- Type
- Tee Beam
- Concrete
- Length
- 109 ft
- 4 main spans
- Daily traffic
- 1,000
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Allenton RD over UP RR is a concrete tee beam carrying Allenton RD over UP RR in St. Louis County, Missouri. It was built in 1928, so it is 97 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 2 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 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 1,350 by 2043. The structure is 109 ft (33.2 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| 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 Allenton RD over UP RR built?
It was built in 1928, making it 97 years old in 2025.
What condition is Allenton RD 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 November 2024.
How much traffic does Allenton RD over UP RR carry?
About 1,000 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Allenton RD over UP RR?
The structure is 109 ft (33.2 m) long with a longest span of 32 ft (9.8 m) and a deck 24 ft wide.
Who owns Allenton RD over UP RR?
It is owned by the City or Municipal Highway Agency.