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r <br /> o Transit Mix Concrete Co. <br /> 1. Comment: Please provide a geotechnical stability analysis for the following stockpile <br /> and backfill locations as required by Rule 6.5 of the Mineral Rules and Regulations of <br /> the Colorado Mined Land Reclamation Board for the Extraction of Construction <br /> Materials. <br /> a. TS 1 - Topsoil Stockpile <br /> b. F 1 - Fines/Overburden Stockpile <br /> c. F3 -North Pit Backfill Area <br /> Response: See separate Stockpile Stability Assessment memorandum included in <br /> Exhibit 6.5. <br /> 2. Comment: Please provide the material placement procedure and testing protocols for <br /> the following stockpile and backfill locations as required by Rule 3.1.5 of the Mineral <br /> Rules and Regulations of the Colorado Mined Land Reclamation Board for the <br /> Extraction of Construction Materials. <br /> a. TS 1 - Topsoil Stockpile <br /> b. F 1 - Fines/Overburden Stockpile <br /> c. F3 -North Pit Backfill Area <br /> Response: See separate Stockpile Stability Assessment memorandum included in <br /> Exhibit 6.5. <br /> 3. Comment: Please explain how the downhill toe of the TS 1 - Topsoil Stockpile and F 1 - <br /> Fines/Overburden Stockpile will be stabilized to prevent potential downgradient movement <br /> of the stockpiles. Please provide geotechnical investigation data and details for the starter <br /> dam/embankment/retaining wall design, if available. <br /> Response: See separate Stockpile Stability Assessment memorandum included in <br /> Exhibit 6.5. <br /> 4. Comment: Please provide the material placement procedure and testing protocols for the F2 <br /> -North Pit Expansion Area backfill as required by Rule 3.1.5 of the Mineral Rules and <br /> Regulations of the Colorado Mined Land Reclamation Board for the Extraction of <br /> Construction Materials. <br /> Response: See separate Stockpile Stability Assessment memorandum included in <br /> Exhibit 6.5. <br /> 5. Comment: Please provide parallel and perpendicular cross-sections for the TS 1 - Topsoil <br /> Stockpile, F 1 - Fines/Overburden Stockpile, F3 -North Pit Area Backfill and F2 -North Pit <br /> Expansion Area for Mining Phases 1 through 6. <br /> Response: See separate Stockpile Stability Assessment memorandum included in <br /> Exhibit 6.5. <br /> Hitch Rack Ranch Quarry (M-2016-010) <br /> Response to Comments—July 14, 2016 <br />