Keystone Crossing over Trib 15
Fair Condition28 years old386 vehicles/day
Location
| State | Missouri |
| County | St. Charles |
| Location | S 11 T 46 N R 2 E |
| Carries | Keystone Crossing |
| Crosses | Trib 15 |
| Coordinates | 38.76052, -90.75907 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 5 (Fair) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 26.9 ft (8.2 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Area | 64.8 sq m |
| Main Spans | 2 |
| Year Built | 1998 |
Traffic
| Avg Daily Traffic | 386 (2024) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 224 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 28194 |