Fig. 7. Estimated recharge percentage as a function of ore texture. Recharge percentage represents the best estimate of long-term steady-state drainage as a percentage of annual precipitation. Crush size represents the estimated average particle size in the heaps. For heaps containing run-of-mine ore, this size was assumed to be 15 cm. Bubble size is 1/N, with N being the number of data points used to calculate recharge percentage. Large bubbles represent fewer data points. The plot suggests that heaps with coarser material allow greater moisture flow and a higher percentage recharge.