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<br />'it IV. East Canal - G System <br /> <br />~ <br />en <br />CJ1 <br />l\) <br /> <br />. <br /> <br />. <br /> <br />The East Canal conveys irrigation water from the East Canal Diversion <br />on the Uncompahgre River in a northerly direction, a distance of 10,6 miles, <br />serving lands on the east side of the Uncompahgre Valley, The East Canal <br />serves 7,670 acres of land, <br /> <br />A. Geology.and Construction Materials <br /> <br />The canal 'flows generally north through an area with Mancos shale <br />bedrock, In the first few thousand feet of the alignment, the canal flows <br />through an area'of flood' plain deposits over river gravel deposited by the <br />Uncompahgre River, Along the rest of the canal alignment, with the exception <br />of the area by Loutzenhizer Arroyo, the canal has been cut into shale bedrock, <br />Shallow'-" clayey, residual.~6ilf>_ ove:rlie the shale in this area. In the <br />vicinity of the Lout.zenhlzer Arr~yo, clay alluvium with trace amounts of <br />gravel is up to 22 feet deep," <br /> <br />Borrow materials for compacted embankment in the East Canal could come <br />from the alluvium of the Loutzenhizer Arroyo and other smaller washes, and <br />from stream terrace deposit of the Uncompahgre River, The alluvial deposits <br />in the washes are lean clays" with plasticity indexes ranging from 10 to 15, <br />The stream terrace deposit is a poorly-graded silty gravel overlain by a <br />thinner deposit of sandy clay, <br /> <br />B, Canal Lining <br /> <br />Approximately 9.8 miles of the canal would be in open, PVC membrane <br />lining, <br /> <br />C. Structures <br /> <br />Structures, to be constructed along the canal would include 10 <br />irrigation crossrngs-, -zr p"arshall flume turnouts, 8 cross-drainage culverts, 2 <br />county road crossings, 'j' farm road crossings, j checks, 11 check drops, and 4 <br />drain inlets. Property to be relocated .would include one gasline crossing. <br /> <br />D, Safety features <br /> <br />Fencing would be placed along both sides of the open section of the <br />canal. The fencing would consist primarily of 4-foot stock fence with <br />segments of the canal near populated areas and major road crossings being <br />fenced with 4-foot wire mesh fence. A segment of the canal near a school zone <br />would be fenced with 6-foot chain link fence, <br /> <br />E. Cross-drainage facilit~es <br /> <br />The previously mentioned cross-drainage culverts would be constructed. <br /> <br />33 <br />