 Nuthurst Mill, alternatively Bircham Mill, or Birchen Bridge Mill was a watermill for corn on the River Arun at the north of the parish and the border with Horsham, just west from today's A281 Brighton Road which runs over the mill's dam.Before 1715 the mill had operated an iron forge, using power from the large lake of the dammed Arun as its mill pond.The iron forge was recorded in the 16th and 17th centuries, as was a parish iron-ore digger in 1588; Sedgwick manor had at that time gained a lease from The Crown to dig for iron ore on its land.