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Greg Lewicki And Associates, PLLC <br /> 3375 W.Powers Circle Phone: (720)842-5321 Fax(303)346-6934 <br /> Littleton.CO 80123 E-mail: info(a%lewicl:i.biz <br /> RECEIVED <br /> October 4, 2019 <br /> Amy Yeldell OCT 072019 <br /> Colorado Division of Reclamation, Mining, and Safety DM 18 N� Tm <br /> 1313 Sherman St, Rm 215 <br /> AFETy <br /> Denver, CO 80203 <br /> RE: Sievers Pit,M-1977-098 <br /> Technical Revision 04 (TR-04) Adequacy Response <br /> Ms. Yeldell <br /> Oldcastle SW Group, Inc. dba United Companies of Mesa County is providing the following <br /> response to the Division's adequacy review of TR-04 for the Sievers Pit. DRMS items are <br /> addressed below. <br /> 1. Provide an updated list of structures within 200 ft. of the affected lands boundary <br /> Please see the answer to item#2. <br /> 2. Per Rule 6.4.19 (a)For any structures within 200 ft. of the affected lands a structure <br /> agreement must be completed OR (b)provide proof of delivery and submit an engineering <br /> evaluation <br /> A geotechnical stability engineering for the Sievers Pit is attached. <br /> 3. If applicable or if site conditions have changed since TR-3,provide updated mining and <br /> reclamation maps <br /> Updated mining and reclamation maps are attached. <br /> 4. Per Rule 6.4.12 provide an updated reclamation cost estimate for site conditions with the <br /> maximum disturbance. Specifically maximum highwall linear feet requiring grading, acres <br /> requiring topsoil/seeding etc. <br /> The worst case reclamation will occur at the end of mining when all 122.9 acres of the site are <br /> disturbed and the final highwall will need to be knocked down. The final highwall represents an <br /> area of active mining that has not been completed to the final 31-1:1 V slope. It is assumed that this <br /> can be accomplished with a dozer push to the final grade. Since there is no major need for <br /> backfill,the main driver of the reclamation cost will be the topsoiling of such a large area. Table <br /> 1 below shows a breakdown of the reclamation tasks and their associated costs. This breakdown <br /> is based on GLA and United's experience with typical DRMS bond calculations. <br /> Sievers Pit TR I XGrcl Icwicki and As--mu-P.AA <br />