Figure 6

a) View towards the Kambarata canyon before the explosion (from upstream to downstream); the yellow line shows the approximate profile of the dam created by the blast. b) Similar view towards the blocked canyon a few hours after the blast. c) Spillway exit downstream from the dam 2 hours after the blast, without water outflow (note also the slope above the exit that partly failed during the explosion). d) View of the spillway exit and of the downstream side of the dam, one day after the blast (with water outflow, note also the seepage in the upper part of the dam due to insufficient height and thickness of the blockage reached during explosion).