Csah 4 over ST Louis River
FairSt. Louis County, Minnesota · 1.0 MI SE of JCT Csah 10 · Structure no. 69518
- Built
- 1982
- 43 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 198 ft
- 3 main spans
- Daily traffic
- 1,450
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 4 over ST Louis River is a prestressed concrete stringer/multi-beam or girder carrying Csah 4 over ST Louis River in St. Louis County, Minnesota. It was built in 1982, so it is 43 years old, older than the Minnesota average of 38.5 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 1,450 vehicles a day, projected to reach 1,350 by 2039. The structure is 198 ft (60.2 m) long and 47 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 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 Csah 4 over ST Louis River built?
It was built in 1982, making it 43 years old in 2025.
What condition is Csah 4 over ST Louis River 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 May 2024.
How much traffic does Csah 4 over ST Louis River carry?
About 1,450 vehicles per day (2019 count).
How long is Csah 4 over ST Louis River?
The structure is 198 ft (60.2 m) long with a longest span of 65 ft (19.9 m) and a deck 47 ft wide.
Who owns Csah 4 over ST Louis River?
It is owned by the County Highway Agency.