Csah 31 over ST Louis River
GoodSt. Louis County, Minnesota · 1.1 MI N of JCT TH 2 · Structure no. 69580
- Built
- 1990
- 35 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 290 ft
- 3 main spans
- Daily traffic
- 405
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 31 over ST Louis River is a prestressed concrete stringer/multi-beam or girder carrying Csah 31 over ST Louis River in St. Louis County, Minnesota. It was built in 1990, so it is 35 years old, younger than the Minnesota average of 38.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 405 vehicles a day, projected to reach 360 by 2039. The structure is 290 ft (88.3 m) long and 35 ft wide. If it were closed, the detour would be 19.3 mi (31 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Csah 31 over ST Louis River built?
It was built in 1990, making it 35 years old in 2025.
What condition is Csah 31 over ST Louis River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.
How much traffic does Csah 31 over ST Louis River carry?
About 405 vehicles per day (2019 count).
How long is Csah 31 over ST Louis River?
The structure is 290 ft (88.3 m) long with a longest span of 95 ft (29 m) and a deck 35 ft wide.
Who owns Csah 31 over ST Louis River?
It is owned by the County Highway Agency.