Escandón's plan, as implemented by de la Garza Falcón, was to establish seven settlements along the river— Revilla, Camargo, Mier, Dolores, Reynosa, Laredo, and Vedoya.
On March 5, 1749, de la Garza Falcón arranged for forty families from Nuevo León to settle at Camargo on the banks of the Rio Grande.
In 1752, de la Garza Falcón established a ranch, Carnestolendas, now the site of Rio Grande City, Texas, on the north side of the river.
[1] After two unsuccessful attempts to settle and colonize land near the Nueces River, Escandón gave the assignment to de la Garza Falcón.
He took his family and employees there and started a ranching enterprise that served as a camp for the Spanish soldiers from Presidio Nuestra Señora de Loreto who explored the vicinity while patrolling in 1767.
Capitan de las Garza Falcón brought his family, servants, friends, longhorn cattle, horses, other domesticated animals and farming tools to his Santa Petronila Ranch settlement.