A spoil tip (also called a boney pile, culm bank, gob pile, waste tip or bing) is a pile built of accumulated spoil - waste material removed during mining. Spoil tips are not formed of slag, but in some areas, such as England and Wales, they are referred to as slag heaps and sometimes as pit heaps. In Scotland the word bing is used. In North American English the term is mine dump or mine waste dump.

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