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4ft+ <br /> 4M <br /> 3 ROCKS <br /> ENGINEERING <br /> August 12'h, 2020 <br /> Matthew Sheldon <br /> Fremont County Engineer/Project Manager <br /> 615 Macon Avenue <br /> Room 204 <br /> Canon City,CO 81212 <br /> The Spotted Burro Pit is located at 4514 County Rd 123, Canon City,CO, 81212 and the property is 53.9 <br /> acres.The accompanying application proposes to expand the total permitted acres from 53.9 acres to <br /> 87.5 acres.The property currently has an office(shipping container), a scale,and a building North of the <br /> current worksite totaling 2,394 square feet of impervious area.A common practice, including at The <br /> Mile High Flood District, is to calculated historical peak flow rates using an imperviousness of 2%.The <br /> current impervious area is about a tenth of a percent and the proposed expansion of the pit will not <br /> increase impervious area.Since the existing and proposed impervious areas are both less than 2%,the <br /> proposed peak flows will not exceed historical peak flows and therefore no detention is required. <br /> ��Pp00 �ICF <br /> Thank you, <br /> '7 533 <br /> Alex Ewers, PE, CFM 9o��sS/, "" ��� <br /> �NAI E <br /> Civil Engineer, Owner <br /> alexeL�3rock5en)ginc,eritig= <br /> 719.430.5333 <br /> 425 NA iiri St S.t;t,� 17 rit)p caty CO 81212 • (i 19) -130 5333 ■ 3:u k,;rnE; <br />