§ Mr. Alec Jonesasked the Minister of Power how many of the six coal tip complexes, reported to the Glamorgan County Council as a possible source of danger, are owned by the National Coal Board; and what steps are being taken to deal with them.
§ Mr. MasonI am informed by the National Coal Board that they have asked for a copy of the report but have not yet received it. They have assured me that the position is still as was stated during the Second Reading of the Mines and Quarries (Tips) Bill namely that all the tips in the Board's ownership in South Wales have been examined, that there are no grounds for anxiety, and that works are being put in hand where necessary to deal with the position in the longer term. Similarly H.M. Inspectors are satisfied that the tips within their jurisdiction do not at present constitute a hazard. They are however, keeping some tips under observation and are in touch with the N.C.B. about the steps being taken to ensure their long-term stability.
As regards the Albion Tip complex at Cilfynydd, mentioned in Press reports, a thorough investigation has already been made by consultations commissioned by the Board. The investigation included putting down bore holes to establish the strength and physical characteristics of the tip material and the underlying strata and to check for water. In their report the consultants advised that both the upper and lower sections of the tip were generally stable but that work should be undertaken to provide a margin against possible deterioration of conditions. These works, which include drainage, regrading certain slopes, removal of material to other parts of the tip, and grassing down of regraded areas, are, I understand, 75 per cent. complete.
A 24-hour watch is kept on the condition of the tip. In addition, measuring instruments for checking water levels have been installed; these are read at regular intervals to give an indication of any change in the hydrogeology of the tip.