Mn 243 over ST Croix River
PoorPosted for loadChisago County, Minnesota · At Wisconsin State Line · Structure no. 6347
- Built
- 1953
- 72 years old, rebuilt 1980
- Condition
- Poor
- inspected April 2024
- Type
- Truss - Deck
- Steel
- Length
- 674 ft
- 5 main spans
- Daily traffic
- 5,686
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 243 over ST Croix River is a steel truss - deck carrying Mn 243 over ST Croix River in Chisago County, Minnesota. It was built in 1953 and reconstructed in 1980, so it is 72 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. Its operating status is: posted for load restriction.
It carries about 5,686 vehicles a day, roughly 10% of them trucks, projected to reach 5,300 by 2042. The structure is 674 ft (205.4 m) long and 34 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Mn 243 over ST Croix River built?
It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1980.
What condition is Mn 243 over ST Croix 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 April 2024.
How much traffic does Mn 243 over ST Croix River carry?
About 5,686 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is Mn 243 over ST Croix River?
The structure is 674 ft (205.4 m) long with a longest span of 162 ft (49.4 m) and a deck 34 ft wide.
Who owns Mn 243 over ST Croix River?
It is owned by the State Highway Agency.