FM 646 over Gum Bayou
Fair Condition42 years old11,441 vehicles/day
Location
| State | Texas |
| County | Galveston |
| Location | 0.90 Mi W Of FM 3436 |
| Carries | FM 646 |
| Crosses | Gum Bayou |
| Coordinates | 29.49263, -95.02167 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 6 — Scour calculated, stable |
Physical Characteristics
| Material | Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 120.1 ft (36.6 m) |
| Max Span | 40.0 ft (12.2 m) |
| Deck Width | 46.3 ft (14.1 m) |
| Deck Area | 516.1 sq m |
| Main Spans | 3 |
| Year Built | 1984 |
Traffic
| Avg Daily Traffic | 11,441 (2020) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 120850304901006 |