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INTRODUCTION <br />Loloff Construction, Inc. proposes to mine the property located in the Southeast' /4 of the <br />Northwest % and the South '/2 of the Northeast '/ of the Northwest 1/, Section 4, <br />Township 5 North, Range 65 West, Sixth P.M. in Weld County, Colorado. The property <br />is bounded by Balsam Avenue on the east, and private property on the north, south, <br />and west. State Highway 263 (8th Street) is less than a quarter of a mile south of the <br />subject property. The proposed mining operation will extract gravel reserves from <br />locations adjacent to man -made structures. The rules and regulations of the Division of <br />Reclamation, Mining, and Safety (DRMS) require that any mining within a 200 foot <br />setback of a man -made structure show thorough engineering analysis that the proposed <br />mining will not cause damage. The accepted method of demonstrating this is through a <br />slope stability analysis. This report contains an overview of the prior geotechnical <br />investigation results by Empire Laboratories, Inc., and the methodology used in the <br />analysis of the mining slopes and their estimated affects on all man -made structures. <br />Recommendations regarding acceptable setbacks from man -made structures have also <br />been included. <br />OVERVIEW <br />The DRMS mining plan proposes that the property will be mined in 2 phases. The <br />reclamation plan, Exhibits E and F, propose the future use for this property to be a <br />water storage reservoir. The mining will occur at 3H:1 V slopes. Concurrent reclamation <br />is planned such that the reclamation embankment will be constructed as the mining <br />progresses. The reservoir will cover an estimated 43 surface acres when full. Actual <br />surface area will depend on the final configuration of the reservoir after reclamation is <br />complete. <br />GEOTECHNICAL DATA <br />Preliminary geotechnical investigations have been performed by Empire Laboratories, <br />Inc. J &T Consulting, Inc. (JT) estimated soil strength parameters based on the <br />information from the geotechnical investigation, which was provided to JT by Loloff <br />Construction, 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 />- Loloff Construction, Inc. - Loloff Pit <br />J &T Consulting, Inc. Slope Stability Analysis <br />1 <br />id I <br />Page 1 <br />