Mo 21 S over Butler Lk
Fair Condition24 years old18,038 vehicles/day
Location
| State | Missouri |
| County | St. Louis |
| Location | S 13 T 43 N R 5 E |
| Carries | Mo 21 S |
| Crosses | Butler Lk |
| Coordinates | 38.46415, -90.40621 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 797.2 ft (243 m) |
| Max Span | 105.0 ft (32 m) |
| Deck Width | 84.6 ft (25.8 m) |
| Deck Area | 6269.4 sq m |
| Main Spans | 8 |
| Year Built | 2002 |
Traffic
| Avg Daily Traffic | 18,038 (2024) |
| Truck Traffic | 5% |
| Lanes On Bridge | 4 |
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 | 29033 |