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© COLORADO <br /> Division of Reclamation, <br /> Mining and Safety <br /> Department of Natural Resources <br /> 1313 Sherman Street, Room 215 <br /> Denver,Colorado 80203 <br /> October 11, 2019 <br /> Michael Ragsdale <br /> Arcosa Materials,Inc <br /> 1112 Copeland Rd, Suite 500 <br /> Arlington TX 76011 <br /> Re: Second Adequacy Review of Amendment Application Package AM03,Arcosa Lightweight- Boulder, <br /> Permit M1988-108 <br /> Mr. Ragsdale: <br /> The Division of Reclamation, Mining, and Safety has completed its second adequacy review of your 112 <br /> construction materials reclamation permit amendment application. The application was called complete for review <br /> on April 8, 2019. All comment and review periods began on April 8,2019. The decision date for this application <br /> has been extended October 31, 2019. Please be advised that if you are unable to satisfactorily address any <br /> concerns identified in this review before the decision date, it will be your responsibility to request an extension of <br /> the review period. If there are outstanding issues that have not been adequately addressed prior to the end of the <br /> review period, and no extension has been requested,the Division will deny this application. In order to allow the <br /> Division adequate time to review your responses to any adequacy issues,please submit your adequacy responses <br /> to the Division no later than one week prior to the decision date(October 21,2019). <br /> Please note that any changes or additions to the application on file in our office must also be reflected in the <br /> public review copy,which has been placed with the Jefferson County Clerk and Recorder. <br /> The review consisted of comparing the application content with specific requirements of Rule 6.1, 6.2, 6.4 and 6.5 <br /> of the Minerals Rules and Regulations of the Colorado Mined Land Reclamation Board for the Extraction of <br /> Construction Materials. In general,the adequacy response received by DRMS on September 30 did an excellent <br /> job addressing the issues previously identified, however, there are a few remaining items that will require <br /> clarification of the existing information. Any inadequacies are identified under the respective exhibit heading in <br /> italics. <br /> EXHIBIT D-Mining Plan (Rule 6.4.4): The revised mining plan provided contains a description of how <br /> waste/off-spec materials will be placed in back into the pit. The method described is stated as: <br /> 1) Waste is staged by trucks along the contours of the side walls of the quarry, then; <br /> 2) Pushed by dozer over the edge of the quarry sidewall allowing the material to slope down the side of the <br /> quarry. <br /> The Division is having difficulty understanding,based on the descriptions provided,how this method is <br /> substantially different from the previous waste disposal method of end dumping the waste directly over the edge <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mimng.state.co.us <br /> Jared Potis, Governor I Dan Gibbs, Executive Director I Virginia Brannon, Director <br /> rt 1876'. <br />