HC Deb 07 March 1967 vol 742 cc245-6W
79. Mr. Kelley

asked the Minister of Power what research is being carried out to prepare colliery spoil for commercial disposal; and what approximate time will be required for the studies to be completed.

Mr. Freeson

The Board already sells large quantities of colliery waste—6.9 million tons in 1965–66. To develop further outlets it is examining the possibility of increasing disposals of waste for brickmaking and of developing its use for the manufacture of aggregates to replace gravel in concrete making. It is also studying the combination of sewage with colliery waste as a fertiliser. The studies are being hastened but I cannot say when they will be completed.