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<br />'!::'E - <br />, " <br />.ju'~ <br /> <br />. <br /> <br />, . <br /> <br />both the upstream and downstream ends with a 14-foot-thick <br /> <br />layer of Zone 2 material consisting of sand, gravel and cobble <br /> <br />fill. The upstream face of the dam will be protected by a <br /> <br />l5-foot-thick layer of rock fill. <br /> <br />-._ '~--_h_ <br /> <br />The spillway, located on the left abutment of the dam, will <br /> <br />have a capacity of 840 c. f . s .at maximum water surface eleva- <br /> <br />tion 9,210.4 (Figure 9, Twin Lakes Area - Capacity Chart). <br /> <br />! <br />! <br /> <br />It will consist of an uncontrolled concrete morning glory <br /> <br />type inlet structure with a crest elevation of 9,208.5, a 12- <br /> <br />foot-diameter concrete conduit under the dam embankment, and <br /> <br />. <br />a concrete stilling basin. A channel downstream from the stil- <br /> <br />I. <br />i ' <br />f <br /> <br />ling basin will carry the water to Lake Creek. <br /> <br />j <br /> <br />The outlet works located in the right abutment will deliver <br /> <br />4,030 c.f.s. to the river at maximum water surface elevation <br /> <br />9,210.4. <br /> <br />A release of 725 c.f.s. can be made to the Otero <br />; <br /> <br />l <br /> <br />Canal throughout the reservoir active conservation capacity. <br /> <br />It will consist of an inlet structure with trashracks, twin <br /> <br />I <br /> <br />8-foot concrete conduits with steel liners, and a gate chamber <br /> <br />, <br />1\ <br /> <br />housing two 6.5-foot by 8-foot high pressure gates. Twin <br /> <br />l2.5-foot concrete conduits, each containing a 98-inch diameter <br /> <br />steel outlet pipe, lead from the gate chamber to the river <br /> <br />outlet control house where two 6.5-foot by 7.5-foot high pres- <br /> <br />sure gates will be located. A chute, stilling basin, and a <br /> <br />. <br /> <br />.A-8 <br /> <br />, <br /> <br />