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1, ti <br /> Transit Mix Concrete Co. <br /> DRMS COMMENTS—PETER HAYS—REVIEW OF EXHIBIT 6.5— <br /> GEOTECHNICAL STABILITY <br /> Hitch Rack Ranch Quarry Waste Stockpile Analyses <br /> 1. The Division is reviewing and verifying the SLOPE/W data provided by Norwest for the <br /> Waste Stockpile Stability Analyses with Clover Technology's Galena software. The Division <br /> will submit comments related to the Waste Stockpile Stability Analyses once the verification <br /> modeling is complete, if required. <br /> Response: Transit Mix understands that the Division is still reviewing and verifying the <br /> Slope/W model results. <br /> Hitch Rack Ranch Pit Wall Geotechnical Assessment <br /> 2. The Division did not receive a map indicating the cross-section profile locations for the <br /> Geotechnical Model Analysis for the Slope L-E models with the Applicant's adequacy response. <br /> Please provide the map indicating the cross-section profile locations for the Geotechnical Model <br /> Analysis for the Slope L-E models. <br /> Response: The pit wall geotechnical assessment was performed to evaluate a variety of <br /> combinations of pit wall heights and geology as well as the specific geological structure in the <br /> Phase 1 portion of the pit. Transit Mix has committed to drilling additional boreholes and <br /> collecting additional geotechnical information to be used to update the pit wall stability <br /> evaluation, and these site-specific data will be used to demonstrate the pit wall stability at <br /> specific locations throughout the life of the quarry. <br /> 3. The Division did not receive the SLOPE/W slope stability analysis model inputs for the <br /> Geotechnical Model Analysis for the Bench L-E and Slope L-E models with the Applicant's <br /> adequacy response. Please provide the SLOPE/W slope stability analysis model inputs for the <br /> Geotechnical Model Analysis for the Bench L-E and Slope L-E models to allow the Division to <br /> duplicate the analysis with Clover Technology's Galena software for verification purposes. <br /> Response: Transit Mix has provided the Division with the Slope/W model input details for the <br /> Slope/W L-E and bench models. <br /> Hitch Rack Ranch Quarry(M-2017-049) <br /> Response to Comments—March 20, 2018 <br />