Laserfiche WebLink
-12- <br />• <br />embankment will involve approximately 48,000 cubic yards of <br />compacted fill. <br />Borrow <br />The results of laboratory testing on typical borrow soils <br />are shown on Figs. 18, 21 and 22. The available borrow soils are <br />essentially medium plasticity clays. In our opinion, there are suf- <br />ficient quantities of suitable clay materials available within the <br />proposed borrow areas far construction of the planned embankment. <br />We recommend borrow from within the reservoir areas, as much as <br />possible, to increase the sediment holding capacity of the reservoir. <br />To avoid problems with disruption of the soils near the toe of the <br />• embankment, we recommend that a buffer zone, approximately 100 feet <br />in width, be maintained between the toe of the proposed embankment <br />and any borrow area. Because of the relatively high water table, <br />it may be most convenient to make a relatively shallow excavation <br />over a large area. Using this method it may be possible to develop <br />clay soils near optimum moisture content with little processing. <br />Embankment Section <br />The proposed embankment section is shown on Fig. g The em- <br />bankment is a modified homogeneous embankment. We recommend con- <br />struction of the embankment entirely out of clay soils compacted <br />to high density. A pervious embankment drain is recommended for <br />the downstream portion of the embankment. Under normal operating <br />r 1 <br />U <br />