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Even though the dust suppression is being taken out of the mine pumping water that returns <br />directly back to the stream, it is an instantaneous impact to the stream and should not have an <br />associated delayed impact. The delayed impacts from mine pumping will be discussed later in <br />this report. <br />POND EVAPORATION <br />Even though there may be no pumping or releases from the pond, water surface evaporation will <br />occur. If the pond storage occurs in priority, the evaporative depletions come out of storage and <br />no release is required. If the evaporation is being replaced by the inflow and a call comes from a <br />downstream water right, then a release in the monthly amount of the evaporation is required. <br />Even though there has never been a call from surface rights on Calamity, Tuttle, and Coal <br />Canyon Draws, or on the San Miguel River below Calamity Draw, this augmentation plan should <br />consider the possibility of an irrigation season call when determining the monthly amounts <br />needed. <br />The evaporation depletions shown in the 1988 Report are less than the revised amounts <br />calculated in this report. When calculating pond evaporation, effective precipitation can be used <br />for ponds that are on a year -round live stream. If the pond is on a dry stream most of the time, <br />there is no credit given. Tables 10 and 11 show the calculations of the evaporation based on 43 <br />inches per year and monthly distribution according to DWR standards. <br />The mine will move to NHN in approximately 2012 to 2013. Because additional ponds will be <br />built and some will be removed, reclaimed, or given back to the landowner, the pond evaporation <br />analysis was split into three different time periods. In the years 2010 and 2011, pond 15 will be <br />added. In the 2013 and 2014 period, NHN Mine Pond 1 will be added. For the last period of <br />2014 to 2018, pond 7 will be given back to the landowner and NHN Mine Ponds 2, 3 and 4 will <br />be built. In 2019 and beyond, many of the ponds will be reclaimed or given back to the <br />landowner, who will then be responsible for evaporative depletions. The summary of <br />evaporative depletions shown in Table 12 is as follows: <br />9 <br />