Csah 40 over Big Fork River
PoorItasca County, Minnesota · 1.0 MI N of JCT TH 1 · Structure no. 31522
- Built
- 1980
- 45 years old
- Condition
- Poor
- inspected May 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 175 ft
- 3 main spans
- Daily traffic
- 110
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 40 over Big Fork River is a prestressed concrete tee beam carrying Csah 40 over Big Fork River in Itasca County, Minnesota. It was built in 1980, so it is 45 years old, older than the Minnesota average of 38.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 110 vehicles a day, projected to reach 100 by 2042. The structure is 175 ft (53.3 m) long and 35 ft wide. If it were closed, the detour would be 13 mi (21 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 40 over Big Fork River built?
It was built in 1980, making it 45 years old in 2025.
What condition is Csah 40 over Big Fork River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does Csah 40 over Big Fork River carry?
About 110 vehicles per day (2022 count).
How long is Csah 40 over Big Fork River?
The structure is 175 ft (53.3 m) long with a longest span of 58 ft (17.8 m) and a deck 35 ft wide.
Who owns Csah 40 over Big Fork River?
It is owned by the County Highway Agency.