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SUBSTITUTE SUPPLY PLAN FOR THE <br />L.G. EVERIST MARYLAND CREEK RANCH <br />AGGREGATE OPERATION <br />(CDMG M-96-049) <br />INTRODUCTION <br />This report has been prepazed pursuant to Senate Bill 93-260 (S.B. 260) to provide the <br />engineering basis for a Substitute Supply Plan at the L.G. Everist, Inc. (L.G. Everist) Maryland <br />Creek Ranch aggregate operation (MCR operation) near Silverthorne, Colorado. The MCR <br />operation has a permit pending (M-96-049) from the Colorado Division of Minerals and Geology <br />(CDMG). This substitute supply plan has been prepazed to satisfy concerns raised by the CDMG <br />relative to the replacement of out-of-priority depletions resulting from the proposed aggregate <br />mining operation and to meet the requirements of S.B. 260. <br />This engineering report contains a quantification of the water requirements, as well as a <br />description of the source of replacement water, at this site for the two yeaz period that this <br />substitute supply plan will be in effect. This plan specifies how the depletions to the Blue River <br />resulting from the evaporative and operational losses will be replaced so as to assure that no <br />material injury occurs to senior water rights below the operation site. <br />STUDY AREA DESCRIPTION <br />The MCR operation permit area is located neaz the Blue River in Sections 15, 22, and 23, <br />Township 4 South, Range 78 West of the 6th P.M., approximately 7 miles downstream from Dillon <br />Reservoir and 16 miles upstream from Green Mountain Reservoir. The proposed MCR operation is <br />directly across State Highway 9 from the current L.G. Everist operation known as the Love Pit <br />881-025.110 Wright Water Engineers, Inc. Page 1 <br />