Csah 21 over Birch River
Good Condition10 years old1,500 vehicles/day
Location
| State | Minnesota |
| County | St. Louis |
| Location | 1.1 Mi N Of Jct Csah70 |
| Carries | Csah 21 |
| Crosses | Birch River |
| Coordinates | 47.73136, -91.96961 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 81.0 ft (24.7 m) |
| Max Span | 77.8 ft (23.7 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 326.0 sq m |
| Main Spans | 1 |
| Year Built | 2016 |
Traffic
| Avg Daily Traffic | 1,500 (2019) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 69A53 |