Mo 109 S over Cst E First ST BNSF R
FairSt. Louis County, Missouri · S 2071 T 44 N R 4 E · Structure no. 3504
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 397 ft
- 7 main spans
- Daily traffic
- 18,408
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 109 S over Cst E First ST BNSF R is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 109 S over Cst E First ST BNSF R in St. Louis County, Missouri. It was built in 1987, so it is 38 years old, younger than the Missouri average of 45.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 18,408 vehicles a day, roughly 5% of them trucks, projected to reach 25,771 by 2044. The structure is 397 ft (121 m) long and 86 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 109 S over Cst E First ST BNSF R built?
It was built in 1987, making it 38 years old in 2025.
What condition is Mo 109 S over Cst E First ST BNSF R in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.
How much traffic does Mo 109 S over Cst E First ST BNSF R carry?
About 18,408 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is Mo 109 S over Cst E First ST BNSF R?
The structure is 397 ft (121 m) long with a longest span of 59 ft (17.9 m) and a deck 86 ft wide.
Who owns Mo 109 S over Cst E First ST BNSF R?
It is owned by the State Highway Agency.