Jan 13, 2014 · Radyr Quarry was opened up principally to provide stone for building Penarth Dock between 1859 and 1865 and certainly did not open before 1857. (The Ely Tidal Harbour and Railway Company was formed in 1856 and the Penarth Harbour, Dock and Railway Company was formed in 1858, after which the Ely Tidal Harbour and Railway Company ceased to exist).