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<br />ENVIRONMENT. INC. PADE 3 <br />81LOAM HTONE -BEDROCK MINE <br />M.L.R.B. PERMIT i~ M-97-OB6 <br />JANUARY 7, 1 99B <br />consequentially the canyon would not be modified to interfere <br />with the natural function of drainage. <br />I need to better explain the 20.0 acre t limit before I go <br />into more detail on how we plan to stay within that limit. As I <br />stated in the text, we expect to have a maximum or 20 acres <br />disturbed at any one time. Five acres could be surface stone <br />area and 15 acres could be slab stone mining area. <br />(a) This is a good idea. I have prepared a typical sketch <br />showing how we think a slab mining area will look. This <br />sketch coincides with the worse case scenario used in <br />Exhibit L, in that there are 4 sides with slopes. Once <br />mining ends on where the site was opened and the sloping is <br />done, only 3 sides would need sloping. The top- <br />soil/overburden is piled around the periphery of the site <br />and in piles on the working area. Any area where mining has <br />reached the permit limits will have final sloping done. <br />Ahead of the working face a section is stripped of topsoil <br />and part of the mined area is reclaimed so that mining could <br />continue to advance. It is possible that we could have two <br />or three of these slab stone areas open at one time, but the <br />same general method of use would be the same, only the area <br />sizes would be different. We will be sure that the total <br />area is no more than 15.00 acres ±. The equipment and fuel <br />storage will be kept on the stone yard area. On page 13, <br />second to the last paragraph of the application. <br />(c) This also is a good idea. Typically isolation berms are <br />built around a mine site to keep offsite surface water from <br />entering the mine. But because of the size and length of <br />time it will take to fully develop the mine, installation of <br />berms around the active mine area is more practical that <br />around the entire permit area. We will maintain a small <br />berm or shallow ditch around each slab rock mining site to <br />keep surface water from entering the disturbed area. Within <br />the active mining area the water will collect in low spots <br />and evaporate or soak into the ground eliminating problems <br />with discharge. Unless we have what is called "process <br />water" discharges from the site no NPDES or Stormwater <br />Discharge permit is necessary. I do not believe we will <br />need one as there have been no process discharges at the <br />site since mining began in the late 1950's. <br />(d) Breaking the site up into 20 acre phases in not practical <br />because of the various types of stone products this mine can <br />produce. If we use a phasing sequence we would constantly <br />have to file revisions with the Division whenever a new type <br />of material comes into demand. Having one or two phases <br />with a limit on the amount of area to be disturbed at one <br />time gives the flexibility required to efficiently meet <br />customer demand. The annual reports are intended to keep <br />the Division informed on how the approved plan is working <br />and to make sure the amount of disturbance is within the <br />