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~ ~ III IIIIIIIIIIIII III <br />- - <br />_ -_ <br />_ __ <br />_- <br />7t~ttleApplegate.,lnc. <br />Consultants for Land, Mineral and Water <br />RECEIVED <br />May 2, 2000 <br />MAY 0 3 2000 <br />Division of Minerals and Geology DiViSi0tI01NIk12f~58G6010~y <br />Department of Natural Resources <br />Attn: Mr. Gregg Squire <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: Response to Adequacy Review Comments, 112 Coustructiou Materials Application, <br />Mobile Premix Concrete, Inc. a subsidiary of Lafarge Corp., Riverbeud Operatiou, <br />Application No. M-2000-016 <br />Dear Mr. Squire: <br />The following discussion and attachments are submitted on behalf of our client in response to the <br />adequacy review comments received for the Riverbend Operation. The Colorado Division of <br />Minerals and Geology submitted adequacy review comments to the applicant on April 13, 2000 <br />and April 20, 2000. The information and discussion below addresses each comment as it was <br />presented by the Division. <br />Response to Mr. Allen Sorenson Comments Submitted oo Apri113, 2000: <br />Comments 1 and 2 <br />The applicant agrees with the complete liner installation cost estimates provided in Comment 1. <br />However, the applicant will be performing reclamation and liner installation during the mining <br />operation. Since it is intended that the liner design will achieve Slate Engineer design standards, <br />the applicant wishes to use a cost estimate for the repair or replacement of 20 percent of the <br />proposed liner in Exhibit L. In support of the liner design and lower cost estimate provided for <br />contingency bonding, Attachment A provides a typical design drawing and specifications in <br />addition to construction and quality assurance/quality control plans for the installation of a sealed <br />liner. <br />Comment 3 <br />Individual logs from drilling operations were not readily available. However, an evaluation <br />report of the gravel resource is provided in Attachment B. The evaluation provides field and <br />laboratory testing results from five exploratory bore holes. Please note that this attachment is <br />marked confidential under Rule 1.3. <br />1 1990 Grant St. • Suite 304 • Denver, CO 80233 5441 Boeing Drive • Suite 200 • Loveland, CO 80538-8855 <br />(303) 452-6611 • Fax (303) 452-2759 (970) 461-9884 • Fax (970) 613-1177 <br />