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<br />-3- <br /> <br />It seems that, in fact, the maximum disturbed area during <br />the life of the mine is greater than 100 acres. The <br />reclamation bond will need to be calculated based upon <br />the point in the life of the mine of. maximum disturbance. <br />This inciudea excavated areas, waste stockpiles, topsoil <br />stockpiles, and waste stockpiles covered with topsoil and <br />covered with temporary vegetative cover (but not the <br />final seed mix). Please provide a map and location of <br />these features at the point of maximum disturbance. <br />Include volumes of each material, haul distances and <br />percent grade (+ or -) and haul routes. <br />4. Exhibit D - Mining Plan in Permit Annlication <br />Page 2 - How Many trucks will be hauling material per day <br />across Highway 667 (How many 85 ton and how many 25 ton7) <br />Page 3 - It is stated that "The 4th Ridge formation contains <br />relatively high quantities of pyrite where it is fresh and <br />unaltered.^: Please provide analyses of Fe, SO4 content in <br />these rocks as well as the range in ~ pyrite contained in this <br />rock. <br />- Will the pyrite material be excavated and exposed to air <br />or water and therefore to oxidation? The Division ie <br />concerned about any acid generation or potential acid mine <br />drainage on site and possibly off site. Will the base of any <br />water body sit on pyritic rock? <br />- The Division recommends that the operator consult 34-32- <br />112.5 and 116.5. as to whether this operation would fit the <br />category of a designated mining operation and therefore is <br />subject to the requirements outlined in these sections, <br />including but not limited to, an environmental protection plan <br />and establishing points of compliance for upgradient and <br />downgradient groundwater monitoring. Please provide either <br />evidence that this is ~ a Designated mining operation or <br />that you will provide the required information for a <br />Designated mining operation. <br />- How will dust be controlled from blowing on and off site? <br />Also, how will kiln duet be handled from the Dowe Flats quarry <br />at the Lyons plant? <br />Blasting Effects - "Ground Vibrations Studk and Air <br />Overpressure Analveis" - Please respond to Allen Sorenson~s <br />Memorandum dated October 13, 1993 (attached) in which he <br />reviewed this report. <br />