Since then, three coal tips summits have been convened and mapping of coal tips across Wales carried out, inspections and maintenance works are on-going.
Ers hynny, mae tair cynhadledd tomenni glo wedi cael eu trefnu ac mae'r gwaith o fapio tomenni glo ledled Cymru wedi'i gynnal, ac mae archwiliadau a gwaith cynnal a chadw’n mynd rhagddynt.