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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Santa Mari a Dam <br />Rehabilitation Feasibility Study <br /> <br />A. Conclusions <br /> <br />The Santa Maria Dam Rehabilitation Feasibilty Study has been pre- <br />pared to provi de a detail ed eval uati on of both the technical aspects <br />and financial feasibility of the project. This study has followed the <br />guidelines of the Colorado Water Conservation Board for the prepara- <br />tion of feasibil ity reports. Following are the conclusions and recom- <br />mendations developed during the course of the study. <br /> <br />1. Seepage Mitigation Plan <br /> <br />The State Engineer's Office has issued a reservoir storage <br />restriction which limits the maximul!1 storage to 32,000 acre-feet for <br />Santa Maria Reservoir, a reduction of more than 11,000 acre-feet from <br />its storage capacity of 43,564 acre-feet at the spillway crest. Thi s <br />restriction was imposed because eI!1bankment seepage becomes significant <br />at higher reservoir levels. An investigation into the seepage mecha- <br />nism was conducted and alternative solutions to alleviate these <br />seepage problems were defined. <br /> <br />The conclusion reached was that excavation of a zone of the <br />existing upstream face and then replacel!1ent of that zone with an <br />impervious clay liner would solve the seepage problems. Groutino the <br /> <br />- i i i - <br />