Csah 31 over Vermillion River
FairDakota County, Minnesota · 0.6 MI N of JCT Csah 74 · Structure no. 19512
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 131 ft
- 3 main spans
- Daily traffic
- 6,945
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 31 over Vermillion River is a steel continuous stringer/multi-beam or girder carrying Csah 31 over Vermillion River in Dakota 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 fair condition with a lowest component rating of 5 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 6,945 vehicles a day, roughly 3% of them trucks, projected to reach 7,400 by 2041. The structure is 131 ft (40 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 31 over Vermillion River built?
It was built in 1974, making it 51 years old in 2025.
What condition is Csah 31 over Vermillion 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 January 2025.
How much traffic does Csah 31 over Vermillion River carry?
About 6,945 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is Csah 31 over Vermillion River?
The structure is 131 ft (40 m) long with a longest span of 50 ft (15.2 m) and a deck 62 ft wide.
Who owns Csah 31 over Vermillion River?
It is owned by the County Highway Agency.