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PART 3-EXECUTION <br /> 3.01 GENERAL <br /> No material shall be placed in any portion of the reclamation slope or demising berm until the foundation and mine <br /> highwall for each section has been dewatered,stripped,excavated,suitably prepared,and has been approved by the <br /> Engineer.A keyway shall be excavated below the demising berm to the extents shown on the plans. A foundation <br /> check sheet shall be signed by the Contractor and Engineer before fill placement. <br /> All cavities,depressions and irregularities,within the area to be covered by embankment fill and which extend below or <br /> beyond the established lines of excavation for reclamation slope or demising berm embankment foundations,shall be <br /> filled with embankment materials as specified for the overlying embankment. <br /> 3.02 FOUNDATION PREPARATION <br /> A. Mine Highwall <br /> The existing mine highwall slopes shall be graded,excavated or cleared of deleterious material. Highwall <br /> overhangs shall be sloped back. Loose slough shall be removed prior to placing reclamation slope soils. <br /> Loose or slough soils on the slope may be removed as the embankment soils are being constructed. <br /> Any gullies or other slope disconformities shall be excavated or smoothed and compacted to a uniform slope <br /> free of any depressions or cavities,prior to fill placement. <br /> B. Removal/Stripping of Weathered Bedrock <br /> The weathered bedrock shall be stripped to an approximate depth of 1'beneath the reclamation slope- <br /> demising berm/weathered contact as directed by the Engineer. Where the bedrock is excavated,the <br /> foundation appearance shall be a mottled mixture of colors,brown/orange in some areas where the <br /> weathered bedrock extends deeper than 1'and gray/blue in areas where the weathered bedrock is less than <br /> 1'thick. <br /> Care should be taken that slabs of bedrock are not dislodged during the foundation bedrock stripping <br /> processes that increase the bedrock excavation beyond 1'. Shallower passes with excavating equipment <br /> may be required during stripping to prevent slab dislodging along bedding planes. <br /> In the demising berm area,a keyway shall be excavated below the weathered bedrock to the depths shown <br /> on the plans. <br /> The entire foundation and key shall be moisture conditioned,rolled and compacted with a sheepsfoot <br /> compactor prior to placement of the first lift of soil. A smooth drum roller shall not be used to compact the <br /> foundation. <br /> The foundation shall be inspected by the Engineer,and a foundation check sheet shall be signed by the <br /> Contractor and the Engineer prior to the placement of fill. <br /> 3.03 STRIPPING(refer Site Preparation and 02200) <br /> 3.04 PLACING RECLAMATION SLOPE AND DEMISING BERM MATERIALS <br /> 02/18 Section 02290-Page 3 of 6 <br />