Csah 21 over Snake River
FairMarshall County, Minnesota · 1.8 MI S of JCT TH 1 · Structure no. 45557
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected November 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 136 ft
- 3 main spans
- Daily traffic
- 235
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 21 over Snake River is a prestressed concrete tee beam carrying Csah 21 over Snake River in Marshall County, Minnesota. It was built in 1996, so it is 29 years old, younger 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.
It carries about 235 vehicles a day, projected to reach 235 by 2038. The structure is 136 ft (41.5 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Csah 21 over Snake River built?
It was built in 1996, making it 29 years old in 2025.
What condition is Csah 21 over Snake 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 2023.
How much traffic does Csah 21 over Snake River carry?
About 235 vehicles per day (2018 count).
How long is Csah 21 over Snake River?
The structure is 136 ft (41.5 m) long with a longest span of 45 ft (13.8 m) and a deck 36 ft wide.
Who owns Csah 21 over Snake River?
It is owned by the County Highway Agency.