Sth 77 over ST Croix River 09
FairBurnett County, Wisconsin · At Minnesota State Line · Structure no. B07000600000000
- Built
- 1984
- 41 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 220 ft
- 3 main spans
- Daily traffic
- 1,800
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 77 over ST Croix River 09 is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 77 over ST Croix River 09 in Burnett County, Wisconsin. It was built in 1984, so it is 41 years old, older than the Wisconsin average of 40.3 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 1,800 vehicles a day, roughly 11% of them trucks, projected to reach 2,160 by 2043. The structure is 220 ft (67.2 m) long and 37 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 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sth 77 over ST Croix River 09 built?
It was built in 1984, making it 41 years old in 2025.
What condition is Sth 77 over ST Croix River 09 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 September 2024.
How much traffic does Sth 77 over ST Croix River 09 carry?
About 1,800 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is Sth 77 over ST Croix River 09?
The structure is 220 ft (67.2 m) long with a longest span of 73 ft (22.4 m) and a deck 37 ft wide.
Who owns Sth 77 over ST Croix River 09?
It is owned by the State Highway Agency.