Mo 21 S over Big Rvr
Good Condition41 years old7,193 vehicles/day
Location
| State | Missouri |
| County | Jefferson |
| Location | S 26 T 39 N R 3 E |
| Carries | Mo 21 S |
| Crosses | Big Rvr |
| Coordinates | 38.08468, -90.66183 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 320.9 ft (97.8 m) |
| Max Span | 88.9 ft (27.1 m) |
| Deck Width | 41.3 ft (12.6 m) |
| Deck Area | 1232.3 sq m |
| Main Spans | 4 |
| Year Built | 1985 |
Traffic
| Avg Daily Traffic | 7,193 (2024) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 3529 |