Csah 18 over Black River
GoodRed Lake County, Minnesota · 1.2 MI E of JCT Csah 3 · Structure no. 92914
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected September 2024
- Type
- Culvert
- Concrete
- Length
- 42 ft
- 3 main spans
- Daily traffic
- 145
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 18 over Black River is a concrete culvert carrying Csah 18 over Black River in Red Lake County, Minnesota. It was built in 1971, so it is 54 years old, older 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 145 vehicles a day, roughly 7% of them trucks, projected to reach 170 by 2038. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 6.2 mi (10 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Csah 18 over Black River built?
It was built in 1971, making it 54 years old in 2025.
What condition is Csah 18 over Black 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 September 2024.
How much traffic does Csah 18 over Black River carry?
About 145 vehicles per day (2018 count), of which roughly 7% are trucks.
How long is Csah 18 over Black River?
The structure is 42 ft (12.8 m) long with a longest span of 9 ft (2.7 m).
Who owns Csah 18 over Black River?
It is owned by the County Highway Agency.