FM 646 over Highland Bayou
Good Condition9 years old12,843 vehicles/day
Location
| State | Texas |
| County | Galveston |
| Location | 0.55 Mi N Of SH 6 |
| Carries | FM 646 |
| Crosses | Highland Bayou |
| Coordinates | 29.38070, -95.09026 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Slab |
| Total Length | 149.9 ft (45.7 m) |
| Max Span | 49.9 ft (15.2 m) |
| Deck Width | 81.4 ft (24.8 m) |
| Deck Area | 1133.4 sq m |
| Main Spans | 3 |
| Year Built | 2017 |
Traffic
| Avg Daily Traffic | 12,843 (2023) |
| Truck Traffic | 2% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 120850097801057 |