FM 509 over Harlingen Airport Drain
GoodCameron County, Texas · 1.00 MI N of FM 1595 · Structure no. 210310236901002
- Built
- 2001
- 24 years old
- Condition
- Good
- inspected July 2024
- Type
- Culvert
- Concrete
- Length
- 36 ft
- 3 main spans
- Daily traffic
- 1,296
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
FM 509 over Harlingen Airport Drain is a concrete culvert carrying FM 509 over Harlingen Airport Drain in Cameron County, Texas. It was built in 2001, so it is 24 years old, younger than the Texas average of 44.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,296 vehicles a day, roughly 33% of them trucks, projected to reach 2,411 by 2042. The structure is 36 ft (11 m) long. If it were closed, the detour would be 6.8 mi (11 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM 509 over Harlingen Airport Drain built?
It was built in 2001, making it 24 years old in 2025.
What condition is FM 509 over Harlingen Airport Drain in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does FM 509 over Harlingen Airport Drain carry?
About 1,296 vehicles per day (2023 count), of which roughly 33% are trucks.
How long is FM 509 over Harlingen Airport Drain?
The structure is 36 ft (11 m) long with a longest span of 10 ft (3 m).
Who owns FM 509 over Harlingen Airport Drain?
It is owned by the State Highway Agency.