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The permA area is not prone to flooding from adjoining properties or the two nearby Spring Creek and Alkali <br />Creek, both of which are interm~lent drainage channels. The predominant drainago course found In the HdnAy <br />of the site is the Eagle River which is north of the permrt boundary and flows approximately 601eet below the <br />site. A review of the Flood Rate Insurance Map for the area indicates, that none of rho disturbed areas on the <br />sRo are prone to flooding by the river <br />Mining rs conducted in a manner that will not increase the discharged amount of surface stormwater runoff <br />above historic flows. Any storm water runoff encoring rho sde will be captured within the pit area and allowed to <br />evaporate or percolate into the ground. In order to maintain the quality of any surface storm water, which <br />crosses any exposed ground areas. a Storm Water Management Plan (SWMP), has been prepared The <br />Colorado Department of Publk Health and Environment has issued a permit A key elemont of the plan calls <br />for grading the area in a manner that will not allow the discharge of any silt laden storm water from the property <br />in the event of a storm. Thus. eliminating any stormwater discharges from the disturbed areas of the sde Thls s <br />accomplished by utilizing a 3 foot high dike adjacent to and above the river- The dike will direct flows to a <br />shallow Swale and ultimately to the existing pond area on the property. A drainage analysis is presented on the <br />following pages. The analysis indicates that the various stormwater conveyance elements are propedys¢od in <br />the event of a major storm event. <br />Wafer is usod on site when necessary to control dust in the mining area, during crushing operations, and on <br />haul roads. Water for dust control a obtained from rho aforernentioned pond. Wetor is also consumed for rho <br />operation of the wash plant. The water supply for the consumptive uses is from existing water rights from en <br />existing nearby well. Water is pumped Irom the well and stored in the oxis6ng pond. <br />/ ~%__.~ <br />~, _ <br />_+ . <br />. y •~_ <br />A wc~•r . ; :r,e ervson~ :eater storege and sediment pond. <br />