Dam Design (TSF)
Primary TSF or mean TSF dam design method. If this mining project has a TSF, enter the risk factor number for its design in this space. For a good explanation of different TSF dam designs see: ICMM
1 - Dry/Filtered 2 - Downstream 3 - Centerline 4 - Upstream
Many mines (such as Gibraltar, in B.C.), also incorporate different dam design methods in a single TSF, from the original design through subsequent raises. The Gibraltar TSF has 7 dams, begun as a combination “modified upstream” and “downstream”, with subsequent raises using the less reliable “upstream” method. In the Summary, we applied an average “3” (centreline) for the Gibraltar Mine TSF design overall risk factor Multiplier.