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spoil bank

spoil bank
  Also spoil-bank.
  [f. spoil n. 7 c or 10.]
  A bank or large mound consisting of refuse earth or similar waste material.

1830 Booth L'pool & Manch. Rly. 55 The remainder, deposited as spoil banks, may be seen heaped up like Pelion upon Ossa. 1854 Hull Improv. Act 9 The piece of land..on the foreshore of the river Humber, near to a spoil bank. 1888 Lees & Clutterbuck B.C. 1877 xiii. (1892) 126 It was nearly all loose red shale, very much like the burnt spoil-banks common in colliery districts.

Oxford English Dictionary

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