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I - INTRODUCTION <br /> Brannan Sand and Gravel proposes to expand the existing West Farm Pit. The property <br /> is located east of the City of Lamar, Colorado. More specifically the property is located <br /> in the south '/Z of Section 26, south Y2 of Section 27, south '/Z of Section 28, south Y2 of <br /> Section 29, north '/z of Section 32, southwest % and north Y2 of Section 33, north '/2 of <br /> Section 34, north '/2 of Section 35, and the northwest '/ of Section 36, Township 22 <br /> South, Range 46 West of the Sixth Prime Meridian, in Prowers County, Colorado. The <br /> property is bounded by private property on the east and west, Prowers County Road <br /> HH.5 on the south, and private property and the City of Lamar sewer lagoons on the <br /> north. United States Highway 50 is approximately one eighth mile south of the subject <br /> property. The proposed mining operation will extract gravel reserves from locations <br /> 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 setback of 200 <br /> feet 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 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 /> II - OVERVIEW <br /> The DRMS mining plan proposes that the property will be mined in 9 phases. Phases 1, <br /> 2, and 9 were previously analyzed and addressed for the current permit area and have <br /> not been included in this analysis for the expansion. The mining of all phases will occur <br /> at 3H:1 V slopes. Concurrent reclamation is planned such that the reclamation <br /> embankment will be constructed as the mining progresses. <br /> III -GEOTECHNICAL DATA <br /> Geotechnical gravel investigations for the property have been performed by Cesare, <br /> Inc. (CES), and Rocky Mountain Industrials, Inc. (RMI). J&T Consulting, Inc. (JT) <br /> estimated soil strength parameters based on the information from the CES report, and <br /> other stability analyses that have been performed on gravel mining operations located in <br /> similar soils. Table 1 below represents a summary of the soil strength parameters that <br /> were used in this stability analysis. <br /> West Farm Gravel Pit Expansion <br /> Slope Stability Analysis <br /> Page 1 <br />