Csah 21 over Swan River
FairPosted for loadItasca County, Minnesota · 0.6 MI W of JCT Csah 10 · Structure no. 31503
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 47 ft
- 1 main span
- Daily traffic
- 511
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 21 over Swan River is a wood or timber stringer/multi-beam or girder carrying Csah 21 over Swan River in Itasca County, Minnesota. It was built in 1961, so it is 64 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 511 vehicles a day, projected to reach 570 by 2042. The structure is 47 ft (14.2 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 21 over Swan River built?
It was built in 1961, making it 64 years old in 2025.
What condition is Csah 21 over Swan River 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 November 2024.
How much traffic does Csah 21 over Swan River carry?
About 511 vehicles per day (2022 count).
How long is Csah 21 over Swan River?
The structure is 47 ft (14.2 m) long with a longest span of 44 ft (13.4 m) and a deck 30 ft wide.
Who owns Csah 21 over Swan River?
It is owned by the County Highway Agency.