Leach Pad or Heap Leach Pad is a pond for the process where precious metals like gold, silver, copper or uranium is extracted from their ore. The ore is placed on the geomembrane (a base pad) with a heap and sprinkling a leaching solvent. As a solvent can be used cyanide or acids. This process dissolves the metals and they collect at the bottom of the pad called collection ditch.

This project consisted of conditioning the existing subgrade area and re-compacting 3,481 CY. Then placing a clay layer material that needed to be screened, processed, transported and then placed 21,916 CY. Anchor trenches on 3 sides were constructed to channel the to the solution collection system.