• Type: East Tailings / Dam Lift
  • Localisation: Mazapil, Mexico
  • Surface: 89.970 m²
  • Product: COLETANCHE® ES3


The first stage of the East Tailings Dam at Minera Peñasquito was waterproofed with a 60 mil LLDPE. All subsequent lifts above elevation1862,7 were planned to be built with rockfill. Continued waterproofing with LLDPE would have required a 0,70 m bedding layer for GCL, a GCL layer, a 0,30 m GCL cover layer, a 0,15 m soil liner and the LLDPE. Both the customer and the consultant wanted a simpler solution to waterproof the upstream face of the dam.

The first lift is 13-meter-high with a slope of 2, 9H:1V.

The solution finally chosen was to use COLETANCHE ES3 deployed on top of a 0,50 m layer of well graded gravel to serve as a transition between the rockfill and the membrane.

To minimize material waste COLETANCHE ES3 was manufactured in 45 m special length rolls.

The main reasons to choose COLETANCHE ® for this project included:

  • Its elevated traction and puncturing resistance.
  • Minimal requirements for preparation of the support surface
  • Possibility of connecting to polymeric membranes

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Environmental protection
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Hydraulic structures
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