Complex sentence: Travelers in the 1840's reported that the Ojo de Salamayuca (Salamayuca Springs) were season, and in the dry season and in a dry year, these springs would cease to flow, which would leave no water source between El Paso del Norte and Carrizal.
Split into simpler sentences: Travelers in the 1840's reported that the Ojo de Salamayuca (Salamayuca Springs) were seasonal. In the dry season of a dry year, these springs would cease to flow, which would leave no water source on the trail between El Paso del Norte and Carrizal.