Mason RD S over Is 64
Fair Condition39 years old6,288 vehicles/day
Location
| State | Missouri |
| County | St. Louis |
| Location | S 17 T 45 N R 5 E |
| Carries | Mason RD S |
| Crosses | Is 64 |
| Coordinates | 38.63860, -90.48082 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 252.0 ft (76.8 m) |
| Max Span | 101.7 ft (31 m) |
| Deck Width | 84.6 ft (25.8 m) |
| Deck Area | 1981.4 sq m |
| Main Spans | 2 |
| Year Built | 1987 |
Traffic
| Avg Daily Traffic | 6,288 (2024) |
| Truck Traffic | 1% |
| Lanes On Bridge | 6 |
| Lanes Under Bridge | 6 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 3549 |