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in place water will accumulate within the underground workings until some equilibrium <br /> conditions prevail. It is conceivable that water that is stored in this manner may arise at the <br /> ground surface through the various near surface joint/fracture system(s) associated with the <br /> mine. Likewise due to the physical (small exposure)and chemical (reducing environment) <br /> characteristics of the sealed mine,the quality of this water would be of a better quality than <br /> what is currently produced from tunnel discharges. <br /> Any attempt to evaluate the quantity and quality of water that may eventually seep from the <br /> mine would require a very in-depth and sophisticated investigative process. <br /> With regard to the Terry Tunnel, and again qualitatively speaking, flow from the tunnel <br /> occurred only after the failure of Lake Emma. The source of water to the tunnel is thus <br /> through infiltration of surface water to and through the disturbed rock associated with this <br /> failure. Therefore, with the planned reclamation of Lake Emma, the flow to the Terry <br /> Tunnel is expected to be reduced. However, since some of the surface/near surface water <br /> enters the mine through the colluvial mantle that surrounds Lake Emma, reclamation of <br /> Lake Emma will not intercept some of this type of inflow. <br /> 10. Please specify energy dissipation measures to be employed at the pond outlets/receiving streams <br /> "commence." <br /> RESPONSE <br /> The response to this question is discussed under response to question D.16. <br /> 11. Sludge disposal at Tailing Pond#3 should be conducted such that reclamation may commence as soon <br /> as possible. Please devise a plan enabling this. <br /> RESPONSE <br /> Sunnyside proposes to continue to use Pond No. 3 for the disposal of sludge from the <br /> American Tunnel settling ponds. Based on current estimates of sludge production, at the <br /> existing stable embankment height there is sufficient capacity,including freeboard capacity, <br /> in the impoundment for several additional years of disposal. Once this disposal capacity <br /> has been reached, the pond will be reclaimed. <br /> 12. Please specify the final configuration of the Borrow Area adjacent to Tailing Pond U. <br /> RESPONSE <br /> The borrow area will be graded to blend the edges of the disturbance area in with existing <br /> contours. Final configuration will approximate pre-disturbance conditions in terms of <br /> slope and aspect. As described in Exhibit E, the area will be revegetated. The final slopes <br /> will be no steeper than 2:1 and are shown on Exhibit F1 and range from about 2.5:1 to 4:1. <br /> -44- <br />