Csah 4 over Island Lake
FairPosted for loadSt. Louis County, Minnesota · 0.6 MI S of JCT CR269 · Structure no. 6665
- Built
- 1949
- 76 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 234 ft
- 3 main spans
- Daily traffic
- 2,907
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 4 over Island Lake is a steel continuous stringer/multi-beam or girder carrying Csah 4 over Island Lake in St. Louis County, Minnesota. It was built in 1949, so it is 76 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. Its operating status is: posted for load restriction.
It carries about 2,907 vehicles a day, roughly 8% of them trucks, projected to reach 3,300 by 2042. The structure is 234 ft (71.4 m) long and 50 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Csah 4 over Island Lake built?
It was built in 1949, making it 76 years old in 2025.
What condition is Csah 4 over Island Lake 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 September 2024.
How much traffic does Csah 4 over Island Lake carry?
About 2,907 vehicles per day (2022 count), of which roughly 8% are trucks.
How long is Csah 4 over Island Lake?
The structure is 234 ft (71.4 m) long with a longest span of 90 ft (27.4 m) and a deck 50 ft wide.
Who owns Csah 4 over Island Lake?
It is owned by the County Highway Agency.