The ancient Rigareh -qanat-based water mill- is located in the Mohammadieh neighborhood.The age of this engineering masterpiece is unknown; however, some historians believe that it dates back to the pre-Islamic era.
The water is supplied by the “Keykhosrow” qanat channel.The mill is placed almost 30 meters underground. The access corridor to the mill is about 110 meters. A qanat channel crosses 8 meters above the mill and fills the huge 8-meters water tank. When enough pressure is provided, the water is released and rotates the turbine.The waste water flows out the channel and joins the main qanat channel with a gradual slope 12 meters farther.

Since the advent of electricity to grind the wheat and barley, this water mill has become a part of history.