The Porth-Gain quarries are linked to an industrial complex to the east (NPRN 33206). Rock won from the coastal quarries above the port was transported by a network of tramways to a crushing and grading plant just above Porthgain and operated by traction engines. The crushed rock was then fed down into a series of fine brick hoppers which flank the harbour, whence it was loaded onto cargo vessels moored beneath (RCAHMW, 91-cs-0238).

Source: Driver, T. 2007. `Pembrokeshire, Historic Landscapes from the Air', RCAHMW, pages 110-111.

RCAHMW, December 2010.