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valley fill

A fill structure consisting of any material other than coal waste and organic material that is placed in a valley where side slopes of the existing valley measured at the deepest point are greater than 20 degrees , or the average slope of the profile of the valley from the toe of the fill to the top of the fill is greater than 10 degrees .

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Penulis

  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 poin
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