After well abandonment consent is given the operator must notify Welsh Government upon completion of the work and a well engineering diagram must be submitted at this time.
Os mai'r ymgeisydd sy'n cynhyrchu'r traffig, bydd angen i Lywodraeth Cymru gael tystiolaeth bod cytundeb ar waith â gweithredwr rheilffyrdd i gludo'r traffig am oes y prosiect.