US 77 SB over FM 509 (helen Moore Rd)
Cameron County, Texas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 77 SB over FM 509 (helen Moore Rd) in Cameron County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2004, making it 21 years old at the 2025 inventory.
- It carries about 29,090 vehicles a day (traffic count year 2011).
- Its listed owner is the state highway agency.
- It is one of 129 of the 354 inventoried bridges in Cameron County rated fair (36.4%); 2 (0.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated February 2023, on a 48-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (26.14986, -97.66753)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 228 ft |
| Location | 1.50 Mi SE of FM 801 |
| NBI structure number | 210310003907331 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2023 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Cameron County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 77 over Hid #1 Drainage Ditch | 2004 | 101,410 | Good |
| US 77 over Ccdd #3 Lateral V | 2004 | 96,376 | Good |
| Us77/83nb-us2/83wb over US 77 Dixieland & Tyler | 1971 | 92,873 | Fair |
| US 83 over Rvsc RR / Palm Court Dr | 2002 | 69,038 | Good |
| US 83 over Drainage Ditch | 2000 | 67,510 | Good |
| US 77 SB over FM 801 (Ed Carey Dr) | 2005 | 63,260 | Fair |
All bridges nearby: Cameron County, TX bridge conditions · every bridge in Cameron County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.