The waste tips and pollution on the hill are the obvious legacy remains of the copper industry. However, there are several other copper-related features on the hill. In Cilfái: The History and Heritage Features, I listed 16 features of Swansea copper heritage. One of them appears to have been completely missed by the several archaeologists that apparently surveyed the area. The Copper 14 Feature (listed on page 57) White Rock Hammer Pond Tunnel is an incredible survivor of a water course that supplied water to the water wheels of the original watermill that was on the White Rock site before the building of the works in 1737. It still works today carrying the Nant Llwynheiernin under the Pentrechwyth Road and into the White Rock site before running out to the river south of White Rock near the original White Rock coal yard.
Below: The White Rock incline and site of Nant Llwyheiernin bridge and tunnel in the early 1930s. The bridge and tunnel still survive buried in the new road.
Below: The tunnel entrance as it survives today.
Nigel Robins 