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RECEIVED <br /> DEERE & AULT JAN10 2018 <br /> DMSION OF RECLAMATION <br /> January 4, 2018 MINING AND SAFETY <br /> Mr. Elliott R. Russell <br /> Colorado Division of Reclamation, Mining and Safety <br /> Department of Natural Resources <br /> 1313 Sherman Street, Room 215 <br /> Denver, Colorado 80203 <br /> Re: Adequacy Review Response#2 TR-04; Pueblo East Pit File No.M-2000-041; <br /> D&A Job No. CG0212.010.00 <br /> Dear Mr. Russell: <br /> This letter response has been prepared by Deere&Ault Consultants, Inc. (D&A)to address the <br /> adequacy items to the Division's satisfaction that are listed in your letter of November 15, 2017 <br /> to John P. Ary. <br /> 15.In response to Adequacy Review Item #3, the Operator has moved the slurry wall <br /> alignment within the permit boundary on the north edge of Phase I Parcel 4, however, <br /> portions of the crest road and slurry wall platform remain outside of the permit <br /> boundary. Although the Operator states the County Special Use Permit has approved <br /> of these activities, which are all located on the same property, the Division cannot <br /> authorize off-site disturbance to occur. However, in this situation, since these are <br /> miscellaneous features associated with the slurry wall and that a separate mine <br /> reclamation permit has been issued for the lands immediately north of the Pueblo <br /> East Pit, the Division will approve these activities if a concurrent Technical Revision <br /> is filed for the Stonewall Springs Quarry Gravel Pit, Permit No. M-2012-045. This TR <br /> will need to verify that the two sites share the boundary and clarify what activities <br /> will be occurring within the permitted area. <br /> A concurrent Technical Revision has been filed. <br /> 16.Please provide the HEC-RAS Model as referenced within the September 2017 Flood <br /> Analysis and Flood Control Plan (Appendix D). <br /> The Arkansas River HEC-RAS model referenced in the September 2017 Flood <br /> Analysis and Flood Control Plan(Appendix D) is provided with this submittal. <br /> 17. Within the September 2017 Flood Analysis and Flood Control Plan (Appendix D), the <br /> Operator is proposing a spillway as an inflow/outflow structure during the 100 year <br /> flood event. The Final Reservoir Grading Plan (Sheet 10) depicts the spillway on the <br /> Spillway Profile along Slurry Wall Alignment cross section. Please demonstrate the <br /> 600 S.Airport Road,Building A,Suite 205 <br /> Longmont,CO 80503 <br /> Phone: 303-651-1468•Fax: 303-651-1469 <br />