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Page 4 ~ • October 4, 1990 State Pit M-90-112 Dan Hernandez Item ;: Concern over the water requirements of the operation. RESPO]SE: This concern was also expressed by Pueblo County in their consideration of the recently approved special use permit. Because water will only be needed for dust control and duet control needs varies tremetidouely with many different factors, it ie very difficult if not impos:iible to provide a meaningful estimate of the volume of water that will t>e needed. For this reason about the only meaningful statement that c:an be made is that water will be supplied as needed. The volume could be none one day and 10,000 gallons the next. No water is avallable on site. Although the agricultural land to the north consumes prodigious amounts of irrigation water and water might be available there, we suspect the designated use of any water in that area is probably of the wrong type to use for dust control in a mine. Although considerable savings in haulage could be achieved if water of the proper use type was available, and this will be checked out, at this time all that can be said confidently is the same thing told Pueblo County. Water for the operation will be hauled either from the pr~ceseing plant in Pueblo or will be purchased from the St. Charles Water :district that serves the needs of residents in this area. The locati~~n where water trucks would actually acquire the water would be determined by agreement with the water district. No washing is anticipated to occur on this site. Therefore, water for processing will not be needed unless at some time in the future washin€; is incorporated. Of course, if washing is done then settling ponds would be needed and this would probably require some modification in the reclamation permit. At that time, the water needs for washing could tie addressed more precisely. Washing systems, unlike dust control systems, usually are based on an amount of consumption that can be fairly accurately predicted. Another factor that enters into an inability to state how much water would be needed for duet control is the question of whether only water is used or whether chemical duet control applications are used. It appears that more and more chemical control is being used because it can lava a lot of money over using just water. But it too has its variations in the amount of water needed. Item 5: Commitment to the reseeding proposals. RESPONSE: The intent of describing the various approaches to revegete~tion was to provide a commitment to using those approaches. Because different conditions and circumstances can dictate different approaches at any one seeding period, a variety of methods were