US 77 NB over FM 509 (helen Moore Rd)
FairCameron County, Texas · 1.50 MI SE of FM 801 · Structure no. 210310003907330
- Built
- 2005
- 20 years old
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 228 ft
- 1 main span
- Daily traffic
- 29,090
- 2011 count
- Owner
- State
- State Highway Agency
About this bridge
US 77 NB over FM 509 (helen Moore Rd) is a prestressed concrete stringer/multi-beam or girder carrying US 77 NB over FM 509 (helen Moore Rd) in Cameron County, Texas. It was built in 2005, so it is 20 years old, younger than the Texas average of 44.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 29,090 vehicles a day, roughly 8% of them trucks, projected to reach 40,730 by 2031. The structure is 228 ft (69.5 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 77 NB over FM 509 (helen Moore Rd) built?
It was built in 2005, making it 20 years old in 2025.
What condition is US 77 NB over FM 509 (helen Moore Rd) in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2023.
How much traffic does US 77 NB over FM 509 (helen Moore Rd) carry?
About 29,090 vehicles per day (2011 count), of which roughly 8% are trucks.
How long is US 77 NB over FM 509 (helen Moore Rd)?
The structure is 228 ft (69.5 m) long with a longest span of 116 ft (35.4 m) and a deck 59 ft wide.
Who owns US 77 NB over FM 509 (helen Moore Rd)?
It is owned by the State Highway Agency.