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-17- <br />a <br />Under this alternative, the water is stored at the existing gage height of 24 (El. 3707) with no <br />additional storage. This alternative has two options. <br />� I i <br />Option A -1: Under this option, a stabilizing berm and toe drain will be constructed D�1111 <br />which is consistent with rehabilitation done for Da Ms, 2 and 3 within the last 14 years. <br />A typical section of this alternative is presented in Fig. 2. <br />Option A -2; This option is intended to bring th dams to the current day dam <br />construction standards, in so far as possib!e, when.wuorking with existing structures. <br />All the dams will be rehabilitated or reconstructed and foundation treatment will be <br />provided to reduce the seepage. New outlet, works will. be provided at Dam 1 to <br />provide water to the wetlands downstream. Partial upstream °slope protection will also <br />be provided, as needed, for dams. <br />The rehabilitation /reconstruction of the dam will consist of widening the dam crest, raising the <br />dams, as necessary, flattening the down stream slope and enhancing embankment stability, <br />and installing slurry trench cutoff into bedrock to reduce unacceptable foundation seepage. <br />Figure 3 shows a typical section of,-the embankment rehabilitation /reconstruction on Dams 1, <br />1 A, and 4. <br />For Dams 2 and 3, the rehabilitation /reconstruction will also include flattening the upstream <br />slope by removal of the concrete paving to a slope of 3:1. A soil cement armor will be <br />constructed on newly graded upstream slopes for slope protection. Fig. 4 shows a typical <br />section of embankment rehabilitated /reconstruction for Dams 2 and 3. <br />8.3 Alternative B <br />Under this alternative, the normal storage level will be raised 3.5 feet to Gage 27.5 <br />(EI 3710.5). This will result in additional storage of 5,300 acre -feet. <br />2 \reports \97 -1 -500. nk <br />