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X. <br /> 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*lewicki.biz <br /> December 12, 2018 <br /> Amy Eschberger SFr 1 / 70 3 <br /> Colorado Division of Reclamation, Mining, and Safety <br /> 1313 Sherman St, Rm 215 DIVISION OF RECLAMATION <br /> Denver, CO 80203 MINING AND SAFETY <br /> RE: Robinson Sons Gravel Pit No. 1, M-2008-076 <br /> AM-01 Adequacy Response 2 <br /> Ms. Eschberger <br /> The following is a response to the Division's December 10, 2018 adequacy review letter. <br /> Exhibit G-Water Information (Rule 6.4.7) <br /> 1. The applicant will provide the Division with a copy of any determination(s) made by <br /> DWR or USACE for this site. <br /> Exhibit L — Reclamation Costs (Rule 6.4.12) <br /> 2. The applicant recognizes that the Division must develop the bond estimate based on costs <br /> incurred by the state. <br /> The reclamation regrading in the creek disturbance area has been revised slightly to show <br /> a grading plan that will eliminate the necessity to haul sand from other locations onsite. <br /> This regrading plan may be revised following consultation with the USACE, but can be <br /> used for reclamation cost calculations at this time. Based on that shown on the revised <br /> Map F-1,the cut and fill volumes are as follows: <br /> Cut Volume <br /> Fill Volume 7,s <br /> Note that the volumes shown above are all bank material. It is likely that sand excavated <br /> during a regrade will have anywhere from 8-20% swell. Therefore this is conservative <br /> enough of a volume estimate to use in bond calculation. The regrade assumes no slopes <br /> created greater than 31-1:1 V and no steeper either.Naturally existing slopes that are <br /> steeper,that already exist,will be left in place. <br /> Robinson Pit No. 1 I Grsg 1—icti and Asawwva 1.1 1 <br />