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Andy Rodriguez'C'iv it Resources <br /> May 24, 2017 <br /> Page 4 of 4 <br /> may be provided to demonstrate that the structures shall not be damaged. <br /> You must provide information sufficient to demonstrate that the stability of any structures located within two <br /> hundred(200)feet of the operation or affected land will not be adversely affected. <br /> As previously stated in the comment for part(g)of Exhibit C,Exhibit S must also include all structures within <br /> 200' of the entire original and amended permit area. When listing structures,please include some type of key <br /> that will allow correlation of structure owners to the proper structures shown on the map. <br /> All structure owners within 200' of the original and amended permit area must be provided with a damage <br /> waiver agreement if this has not already been done. (A listing of structures at the time of the original <br /> permitting is contained in the RMC geotechnical stability analysis dated November 13, 2000.) Any new <br /> structures put in place since the original permit was approved(such as the gas/oil facility located on the eastern <br /> area of the existing permit)must also be included. <br /> It is also noted that the proposed offsets in the previous RMS report were 50 and 60 feet with a safety factor <br /> of 1.5 and 1.6 respectively. This is considerably greater than the currently proposed minimum setback of 15 <br /> feet. The data table provided in the current geotechnical report indicates safety factors for four different cross <br /> sections in the amendment area between approximately 4.3 and 1.4, however, the distance between the <br /> structures and excavation is not listed. Please elaborate how the minimum offset of 15 feet was arrived at <br /> from the data provided. <br /> Additional Information: You will also need to provide the Division with proof of notice publication(once <br /> a week for 4 consecutive weeks beginning after the application was called complete)and notice to all property <br /> owners within 200 feet of the affected area (entire permit). Any letters from other commenting <br /> agencies/entities received by the Division to date have been imaged and are available to view via the Imaged <br /> Documents link on the DRMS website. <br /> This concludes the Division's preliminary adequacy review of this application. This letter shall not be <br /> construed to mean that there are no other technical deficiencies in your application. Other issues may arise as <br /> additional information is supplied. Please remember that the decision date for this amendment application is <br /> August 7, 2017. As previously mentioned, if you are unable to provide satisfactory responses to any <br /> inadequacies prior to this date, it will be your responsibility to request an extension of time to allow for <br /> continued review of this application. If there are still unresolved issues when the decision date arrives and no <br /> extension has been requested,the application will be denied. If you have any questions,please contact me at <br /> (303) 866-3567 x8140. <br /> Sincerely, <br /> Eric Scott—Environmental Protection Specialist <br />