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<br />Final Draft - Preferred Storage Options Plan <br />Southeastern Colorado Water Conservancy District <br />June 8, 2000 <br /> <br />technical and construction issues because the limits of a parapet wall raise would be <br />exceeded. <br /> <br />The 11,950 af of additional capacity would be created by raising the normal maximum <br />pool and morning-glory spillway crest by 6.6 feet. For extreme flood routing, the dam <br />crest would be raised with construction of a 4-foot high parapet wall on the upstream side <br />of the dam crest. The larger 19,600 af capacity increase would require raising the <br />embankment crest by 4 feet in addition to providing a 4-foot-high parapet wall on the <br />upstream side of the dam crest. The operating pool and spillway crest elevation would <br />be raised by 10.7 feet to provide the 19,600 af of additional water conservation storage <br />space and flood-routing capacity. <br /> <br />"1 <br />I <br /> <br />Environmental and Permitting Issues. Turquoise Reservoir enlargement is not expected <br />to have significant environmental issues provided there are no significant changes in flow <br />that affect aquatic resources or water quality downstream. An Environmental <br />Assessment (EA) or EIS will be required to document impacts associated with raising <br />SugarloafDam to enlarge Turquoise Lake. The USBR would be the likely lead agency. <br />(An EIS will be required if the Turquoise enlargement is part of a larger development.) <br /> <br />Imnlementat,.on Co<t C'o<::t f"<:tlm::ltp~ fnr r~lC::lno <':lICf';lrlno:lof T\"JITn ",.,....0. ....l.:u,Ql.....po.....l \..,' <br />, '-' . ----- ---....-.-... ........ .................0 .........o...u..v..... ...........1. ~y'-'.I"" U....."'-'IV \o.oU UJ <br />B&V. Total project cost, including modifications to the dam, facilities modification, <br />permitting, and environmental investigation is estimated to be $8.3 million for the 11,950 <br />afenlargement and $14.5 million for the 19,600 af enlargement. <br /> <br /> Cost in $ Million <br /> Major Cost Item 11,950 af 19,600 af <br />. General Conditions 0.7 1.2 <br />. Dam Construction 2.8 6.1 <br />. Facilities Modification Construction and 1.9 2.0 <br /> Miti9ation <br />. Permitting and NEPA 0.4 0.8 <br />. USSR Legal, Administrative and Engineering 2.5 4.4 <br /> Costs <br />. Total Project Cost $8.3M $14.5M <br /> Unit Cost ($/af) $690 $740 <br /> <br />m GEl Consultants, Inc. <br /> <br />3-12 <br /> <br />1 \PROJECTS\9906I\Repons\Preferred SOP finaJ,wpd <br />