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Page 2 Hr. Smyth October 10, 1980 Please state the estimated volume of topsoil available From each Ea ~, r-~-^ Q ~ Q phase of mining, the proposed topsoil stockpile location(s), and the approximate depth to which topsoil will be reapplied to all affected land remaining above water level. Topsoil should not be utilized for other purposes than the creation of a suitable plant growth medium during final reclamation. If topsoil stockpiles will remain in place longer than one growing season, please state the seed mixture to be applied to such stockpiles in order to establish a vegetative cover as a means of stabilization against erosion and general deterioration. 5. Operations located within the 100 year flood plain pose special recl.mation problems and considerations regarding topsoil placement and stabilization. If topsoil stockpiles are not protected from the l00 year plain reclamation could be jeopardized by the loss of topsoil due to the erosional forces of the flood waters. Typical measures such as establishing a good vegetative cover over the topsoil stockpiles might not be sufficient protection during such an event. Further, when the 100 year event does not occur, the effects of high water alone could pose similar problems to topsoil protection and preservation. In light of the above, and for operations located within the 100 year flood plain, the application should address how topsoil will be protected from flood waters, per Rule 6.4 (a) and (c) in the Rules and Regulations. Possible alternatives might entail placement of the topsoil stockpiles above the 100 year flood plain, should such areas be available. Within the 100 year flood plain, topsoil stockpiles should be located at the highest available elevation and subsequently surrounded with a berm composed of overburden or deposit material at a height and thickness sufficient to withstand the event. IF deposit material is used, it could be utilized following the removal of the stockpiled topsoil for replacement during final reclamation. Regardless of the method used to protect the topsoil stockpile, a complete vegetative cover would remain an essential component in the protection and preservation or topsoil removed or exposed during the mining operation. 6. Overburden (but not toh~oil) can be used for construction of permanent scrueniny mounds,irowever, the location of such mounds sfrould be identified. Dimensions of the proposed mounds should allow fora minimum percent slope of 3:1 (preferred). 7. Prior to excavation, the number, location, and shape of the proposed ponds should be determined such that their respective buffers or dividing areas between ponds can be established by leaving such predetermined buffers unexcavated and thereby negating the need for stockpiling material which would be utilized later to create buffers by~backfilling, as proposed in 6.5 E3 in the application. (cont'd)