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Exhibit S - Geotechnical Stability <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 <br />affected by blasting. <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 stability analysis <br />was performed by CGRS, Ft. Collins, Colorado, follows. The report verifies that the <br />maximum planned extraction slopes of 1.25H:1 V will not pose a hazard to such <br />structures. To the extent practical, operations will remain 125.0± feet or greater from <br />residential structures, not otherwise owned or controlled by the operator. Concurrent <br />grading and reclamation of completed areas of extraction will reduce extracted slopes to <br />a minimum of 2H:1 V to 3H:1 V, or flatter, over a majority of the extraction area, in <br />conformance with Rule 3.1.5(7). <br />Varra Companies, Inc. Heintzelman Project RMS 112 Permit Application 2 <br />2 February 2009