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<br />SECTION 203 <br />Excavation and Embankment <br />Description <br /> <br />203.01 This work shall consist of excavation, disposal, shaping or com- <br />paction of all material encountered within the limits of the work necessary <br />for the construction of the embankment in accordance with the specifications <br />and in reasonable close conformity with the lines, grades, and typical <br />cross sections shown on the plans or as staked by the Engineer. All <br />excavation will be classified, "Unclassified Excavation," as hereafter <br />described. <br />203.02 Unclassified Excavation <br />Unclassified excavation shall consist of the excavation of all materials <br />of whatever character required for the work, obtained within the slope <br />stakes, including surface boulders and excavation .f or ditches and channels. <br />203.03 Rock Excavation <br />Rock Excavation shall consist of igneous, metamorphic, and sedimentary <br />rock which cannot be excavated using a D9 with rippers. <br />203.04 Embankment Material <br />Embankment Material shall consist of approved material acquired from exca- <br />vations, hauled and placed in embankments in reasonable close conformity <br />with the line, grades, thicknesses and typical cross sections shown on <br />the plans or established. <br />The type of relative compaction required shall be as called for on the <br />plans or as designated. <br />When the source of embankment material is not designated on the plans, <br />approval of the source will be contingent on the material having a <br />maximum liquid limit of 45 and a maximum plasticity index of 20. Soils <br />excavated from the existing dam may be used for embankment material pro- <br />vided it is free from rubbish, coal waste, wood and other deleterious <br />substances. <br />203.05 Borrow <br />Borrow shall consist of approved material obtained from outside the slope <br />stakes, acquired for the construction of embankments or for other portions <br />of the work. Borrow shall consist of clays having a maximum liquid limit <br />of 45 and a maximum plasticity index of 20. <br />203.06 Geneial <br />The excavation and embankments for the dam shall be finished to reasonably <br />smooth and uniform surfaces. Variation from the finished grade shall not <br />be more than .08'. Materials shall not be wasted without permission of. the <br /> <br />