 An important economic institution for Rehweiler in days of yore was the mill.In 1585, it was given over into "Erbbestand" (a uniquely German landhold arrangement in which ownership rights and usage rights were separated; this is forbidden by law in modern Germany), during the Thirty Years' War it was destroyed and in 1675 it was repaired.According to the "Sundahl’sches Mühlenprotokoll", this mill had two waterwheels that drove two grist runs with cage gear, and a husking run.