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<br />Ita <br />I <br /> <br />Need for the Project <br /> <br />ta <br /> <br />The JLRIC is undertaking repairs to their headgate river <br />diversion structure to ensure that it can continue to divert <br />water from the South Platte River. The current facility has two <br />major components. They are the ditch intake and the river <br />diversion structure. The ditch intake is a concrete structure <br />using four steel radial gates for adjusting flows into the ditch. <br />This structure is in good condition and can still adequately <br />control flows into the Jackson Lake inlet. This structure has <br />suffered only minimal damage due to times of high flow in the <br />river. The river diversion, which uses a board system to divert <br />flow into the ditch, has suffered extreme damage due to times of <br />high flow in the river. This structure had suffered damage in the <br />past but flooding in the spring of 1999 has rendered the <br />diversion non-operational and was still in the same condition at <br />the time of this study, The spring flood destroyed a majority of <br />the walkway used to cross the diversion and place boards. Along <br />with the missing walkway are the actual boards used in the <br />structure. These boards created a diversion approximately 200 <br />feet in length. The spring flood also eroded behind the concrete <br />wingwall located on the South side of the river. This has allowed <br />the river to channel around the existing diversion. Additional <br />problems do occur with the existing structure; they include sand <br />plugging the ditch and debris, mainly trees, hanging up on the <br />diversion. See photos, pages 4 and 5. <br /> <br />'ta <br /> <br />Ita <br /> <br />ta <br /> <br />Feasibility Study <br />Jackson Lake Reservoir and <br />Irrigation Company Diversion Structure <br />September 1999 <br /> <br />2 <br /> <br />. <br />