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INTRODUCTION <br /> IHC Scott Inc., proposes to mine the property located in the northeast 1/4 of Section 24, <br /> Township 4 North, Range 67 West of the 6th Principal Meridian, in Weld County, Colorado. <br /> The property is bounded by the private property on all sides, with the South Platte River <br /> being adjacent to the southeast boundary of the property. The proposed mining operation <br /> will extract gravel reserves from locations adjacent to man-made structures. The rules <br /> and regulations of the Division of Reclamation, Mining, and Safety (DRMS) require that <br /> any mining within a 200-foot setback of a man-made structure show thorough engineering <br /> analysis that the proposed mining will not cause damage to the structure. The accepted <br /> method of demonstrating this is through a slope stability analysis. This report contains an <br /> overview of the methodology used in the analysis of the mining slopes and their estimated <br /> affects on all man-made structures. Recommendations regarding acceptable setbacks <br /> from man-made structures have also been included. <br /> OVERVIEW <br /> The DRMS mining plan proposes that the property will be mined in a single pit, and <br /> reclaimed as a water storage reservoir. The mining will occur at 2H:1V slopes. The <br /> reservoir will be reclaimed by backfilling the mining slopes with overburden/clay soils at <br /> 4.5H:1V slopes, and will cover an estimated 93 surface acres when full. The actual <br /> surface area will depend on the final configuration of the reservoir after reclamation is <br /> complete. <br /> GEOTECHNICAL DATA <br /> Exploratory borings and monitoring wells were done on the site by Cesare Inc./CMT <br /> Technical Services. Logs of the borings and monitoring wells used to estimate the soil <br /> types and thicknesses for this study are included in Appendix D. J&T Consulting, Inc. (JT) <br /> estimated soil strength parameters based on the information from the boring and monitor <br /> well logs and other stability analyses that have been performed on gravel mining <br /> operations along the Front Range. Table 1, on the following page, represents a summary <br /> of the soil strength parameters that were used in this stability analysis. <br /> IHC Scott,Inc.—Bernhardt Sand and Gravel Pit <br /> Slop <br /> J&T Consulting, Inc. e Stability Analysis <br />