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781 <br />~J W. W. Wheeler and Associates, inc. <br />___.~~ Wnter Resources Engineers <br />April 13, 2006 <br />Ms. Angela Bellantoni <br />Environmental Aitematives, Inc. <br />410 Maeon Avenue <br />Canon City, CO 81212 <br />Ra: #1tit75 -Allen Concrete Batth Plant and Grave! Quarry <br />near Falrplay, Colorado <br />Dear Angela: <br />?he purpose of this letter is to provide information concerning the potential flood <br />risk at the proposed Allen project site and to provide information concerning the <br />proposed water supply. <br />The proposed Site i:; located at least 4,000 feel from the Middle Fork of the South <br />Platte River. One hundred-year flood plain mapping by FEMA indicates that the <br />proposed site is also at least 2,500 feet from the outside limit of the flood plain. <br />Therefore, I conclude that aN project site is clearly outside of the 100-year flood plain. <br />The annual water rr:quirement for the project is approximatey 3.0 aae-feet. Of <br />this total amount, approximately 5,85 acre-feet will be Consumed as evaporation bss in <br />the gravel washing process and in the concrete belching process. Although the natural <br />groundwater table is reportedly relatively shallow et the project site, it is my <br />understanding that the App'IcaM proposes to limit the depth of all ex~araflons so that no <br />groundwater will be exposetl. The water supply for The pfojed will be obtained from an <br />ort-site well. The required madmum pumping rate from a proposed on-site well will Ge <br />approximately 50 gallons par minute, although the well will only be operated at this rate <br />for relatively short periods .if time each day. The overall average pumping rate will be <br />less than 4 gallons per minute. The on-site well will obtain its water Supply from the <br />alluvial aquifer of the Midcle Fork of the South Platte River. The Applicant plans to <br />obtain appropriate water rights for operation of the will pursuant to a blanket <br />augmentation plan sponsored by the Upper South Platte Water Conservancy District and <br />the Center of Colorado VVatar Gonservancy Distdct. These entities are currently <br />3700 South Inco Scr¢et En9lewooc~. Coiorodo 80110. (303) 767-a130 FR7C (3D3) 761-2809 <br />