FM 509 over Harlingen Airport Drain
Good Condition25 years old1,296 vehicles/day
Location
| State | Texas |
| County | Cameron |
| Location | 1.00 Mi N Of FM 1595 |
| Carries | FM 509 |
| Crosses | Harlingen Airport Drain |
| Coordinates | 26.23114, -97.63247 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 6 (Satisfactory) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 36.1 ft (11 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 147.4 sq m |
| Main Spans | 3 |
| Year Built | 2001 |
Traffic
| Avg Daily Traffic | 1,296 (2023) |
| Truck Traffic | 33% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 210310236901002 |