Csah 21 over Prior Lake
GoodScott County, Minnesota · 1.4 MI NW of JCT TH 13 · Structure no. 70517
- Built
- 1991
- 34 years old
- Condition
- Good
- inspected October 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 103 ft
- 3 main spans
- Daily traffic
- 18,000
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Csah 21 over Prior Lake is a prestressed concrete tee beam carrying Csah 21 over Prior Lake in Scott County, Minnesota. It was built in 1991, so it is 34 years old, younger than the Minnesota average of 38.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 18,000 vehicles a day, projected to reach 17,300 by 2039. The structure is 103 ft (31.5 m) long and 68 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Csah 21 over Prior Lake built?
It was built in 1991, making it 34 years old in 2025.
What condition is Csah 21 over Prior Lake in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.
How much traffic does Csah 21 over Prior Lake carry?
About 18,000 vehicles per day (2019 count).
How long is Csah 21 over Prior Lake?
The structure is 103 ft (31.5 m) long with a longest span of 40 ft (12.3 m) and a deck 68 ft wide.
Who owns Csah 21 over Prior Lake?
It is owned by the County Highway Agency.