Csah 18 over Mississippi River
GoodItasca County, Minnesota · 2.5 MI W of JCT Csah 11 · Structure no. 31512
- Built
- 1974
- 51 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 246 ft
- 3 main spans
- Daily traffic
- 285
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 18 over Mississippi River is a prestressed concrete stringer/multi-beam or girder carrying Csah 18 over Mississippi River in Itasca County, Minnesota. It was built in 1974, so it is 51 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 285 vehicles a day, projected to reach 285 by 2039. The structure is 246 ft (74.9 m) long and 40 ft wide. If it were closed, the detour would be 26.1 mi (42 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 | 8 Very Good | No problems noted. |
| 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 18 over Mississippi River built?
It was built in 1974, making it 51 years old in 2025.
What condition is Csah 18 over Mississippi 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 May 2023.
How much traffic does Csah 18 over Mississippi River carry?
About 285 vehicles per day (2017 count).
How long is Csah 18 over Mississippi River?
The structure is 246 ft (74.9 m) long with a longest span of 80 ft (24.4 m) and a deck 40 ft wide.
Who owns Csah 18 over Mississippi River?
It is owned by the County Highway Agency.