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Page 12 <br /> 6.4.19 EXHIBITS - Permanent Man-made Structures <br /> analysis. The minimum acceptable safety factors will be subject to approval by the Office, <br /> on a case-by-case basis, depending upon the degree of certainty of soil or rock <br /> strength determinations utilized in the stability analysis, depending upon the <br /> consequences associated with a potential failure, and depending upon the potential <br /> for seismic activity at each site. <br /> (4) At sites where blasting is part of the proposed mining or reclamation plan, the <br /> Applicant shall demonstrate through appropriate blasting, vibration, geotechnical, <br /> and structural engineering analyses, that off-site areas will not be adversely affected <br /> by blasting. <br /> 'The notarised agreements between the applicant and the person(s) having an interest in <br /> the structure, that the applicant is to provide compensation for any damage to the <br /> structure obtained as of January 03, 2023 are attached as an addendum to this Exhibit S. <br /> These are unchanged from previous submission of June 13, 2022 on file as an addendum <br /> to the application. Notarized agreements obained are with: <br /> - DCP Midstream <br /> - Weld County Public Works <br /> - City of Aurora Water Department <br /> - JDLB Farm LLC <br /> - City of Evans <br /> - Central Weld Country Water District <br /> A complete list of structure owners is shown on Exhibit C-1: Existing Conditions Map and <br /> are attached as an addendum to this Exhibit S. <br /> To assure the stability of any significant, valuable, and permanent man-made structures <br /> that may exist within 200 feet of planned extraction activity, a complete and thorough <br /> stability analysis was performed by American Water Engineering Services, LLC. (AWES). <br /> Their reports of 23 December 2019 and 10 August 2022, are based upon on-site samples <br /> collected from the intended areas of extraction. Copies of the AWES reports are included <br /> at the back of this exhibit. <br /> The included AWES report verifies that the maximum planned extraction slopes of <br /> 1.25H:1V (and 2H:1V to the extend indicated by a Red Boundary along the Eastern <br /> Extraction Limit and a portion of the Southern Extraction Limit in Central Field) will not <br /> pose a hazard to such structures. The location of the extent of the 2H:IV extraction slope <br /> limits is shown in RED as indicated on the Exhibit C-2: Extraction Plan Map. <br /> ' Adequacy Item 57 <br /> VARRA COMPANIES, INC. TWO RIVERS SAND GRAVEL AND RESERVOIR PROJECT MARCH 2O22 <br /> A REGULAR IMPACT[1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MIING&SAFETY <br /> OFFICE OF MINED LAND RECLAMATION <br />