Following the major landslide of a disused tip in Tylorstown which caused over 60,000 tonnes of debris to fall into the Rhondda Fach River, the Coal Tip Safety Task Force was established.
Yn dilyn tirlithriad mawr tomen nas defnyddir yn Tylorstown a achosodd dros 60,000 tunnell o falurion i ddisgyn i Afon Rhondda Fach, sefydlwyd y Tasglu Diogelwch Tomenni Glo.