 The buildings around the creek was mostly built from blocks of slag, called scoria; waste material from the smelter, providing a distinctive building material.Hence the name ″Black Road″.In 1825 an Act of Parliament established the "Hayle Bridge Causeway Turnpike Trust" which was required to construct a bridge, causeway and turnpike over the Hayle River from Griggs Quay () in the west to Phillack in the east.