Mo 21 S over Is 270
Fair Condition59 years old36,433 vehicles/day
Location
| State | Missouri |
| County | St. Louis |
| Location | S 1998 T 44 N R 6 E |
| Carries | Mo 21 S |
| Crosses | Is 270 |
| Coordinates | 38.51310, -90.37126 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 259.8 ft (79.2 m) |
| Max Span | 78.1 ft (23.8 m) |
| Deck Width | 138.8 ft (42.3 m) |
| Deck Area | 3350.2 sq m |
| Main Spans | 4 |
| Year Built | 1967 (reconstructed 1996) |
Traffic
| Avg Daily Traffic | 36,433 (2024) |
| Truck Traffic | 5% |
| Lanes On Bridge | 9 |
| Lanes Under Bridge | 8 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 829 |