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__ <br />'hrtttleApplegate, Ilnc. <br />Consultants for Land, Mineral and Water <br />May 24, 2000 <br />Division ofMinerals and Geology <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 Construction Materials Application, <br />Mobile Premix Concrete, Inc. a subsidiary of Lafarge Corp., Riverbend Operation, <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 May 5, 2000. <br />The information and discussion below addresses each comment as it was presented by the <br />Division. <br />General Response: <br />As stated previously, the applicant does not anticipate that the lined reservoirs will affect alluvial <br />ground water elevations up or down gradient of the site. [f potential impacts are identified (i.e. <br />ground water mounding and potential flooding of Weld County Road 6), and monitoring data <br />and other information indicate that the lined pits are responsible for the impacts, the applicant <br />will mitigate the identified impacts to the Division's satisfaction. Measures to mitigate ground <br />water mounding may include subsurface ground water drains or ground water interception <br />trenchs. <br />Response to Mr. Allen Sorenson Comments: <br />Comments 1 <br />• The applicant will provide the Division with a statement that the approved plans and <br />specifications for the liner design can not be altered without consent by the Division. <br />The moisture content specification will be changed to no more than 1 percent dry of <br />optimum for the clay/shale core (Zone 1). <br />11990 Grant St. • Suite 304 • Denver, CO 80233 5441 Boeing Drive. • Suite 200 • Loveland, CO 80536-8855 <br />(303j 452.6611 • Fax (303) 452-2759 (970) 461-9884 • Fax (970) 613-1177 <br />