The tip was the responsibility of the National Coal Board ( NCB ) , and the subsequent inquiry Scrutiny placed Placing the blame Judgment_communication for the disaster Catastrophe on the organisation and nine named Name_conferral employees .

In contravention of the NCB 's official procedures , the tip was partly based on ground from which water springs emerged Coming_to_be .

The report Reporting placed Placing the blame Judgment_communication squarely on the NCB .

The organisation 's chairman , Lord Robens , was criticised Judgment_communication for making Creating misleading statements Statement and for not providing Giving clarity as to the NCB 's knowledge of the presence Presence of water springs on the hillside .

Neither the NCB nor any of its employees were prosecuted Judgment_communication and the organisation was not fined Judgment_communication .

The remaining tips were removed Removing only after a lengthy fight Defending by Aberfan residents , against resistance Defending from the NCB and the government on the grounds of cost Cost .