Laserfiche WebLink
<br />III, Seli~ Canal- E Svstem <br /> <br />. <br /> <br />~ The Selig Canal conveys irrigation water from the Selig Canal Diversion <br />~~ on the Uncompahgre River in a northerly direction, a distance of 20.1 miles, <br />~~ serving lands on the east side of the Uncompahgre Valley, The Selig Canal <br />~ serves 9,960 acres of land, The capacity of the canal would range from 260 to <br />10 cfs, <br /> <br />A, Geology and Construction Materials <br /> <br />The canal flows north through and area of Mancos Shale bedrock. In the <br />first mile of the alignment, the canal crosses a area of river gravel overlain <br />by flood plain deposits, In the rest of the canal alignment, with the <br />exception of a few areas by Loutzenhizer Wash, the canal has been cut into <br />shale bedrock, The shale in this area is overlain by shallow clay and silt <br />soils. In the area by Loutzenhizer Wash, the canal crosses areas of deep <br />fine-grained alluvium, This alluvium is predominately lean clay and is up to <br />24,5 feet deep, <br /> <br />Borrow materials for compacted embankment in the Selig Canal could come <br />from the flood plain deposits of the Uncompahgre River, the alluvium of <br />Loutzenhizer Wash, and a small terrace gravel deposit near the Selig Canal. <br />The flood plain and alluvial soils are lean clays, and the terrace deposit is <br />a silty sand with cobbles and boulders. <br /> <br />B, Canal Lining <br /> <br />. <br /> <br />Approximately 20,1 miles of the canal would be in open, PVC membrane lined <br />section. <br /> <br />C. .Structures <br /> <br />Structures to be constructed along the canal would include 17 <br />irrigation crossings, 71 parshall flume turnouts, 20 cross-drainage culverts, <br />8 county bridges,S farm crossings, 17 checks, 17 check drops, 3 pipe drops, 4 <br />rectangular-inclined drops and 1 chute. Property to be relocated would <br />include one waterline crossing and one gasline relocation. <br /> <br />D. Safety Features <br /> <br />Fencing would be placed along both sides of the canal for the entire <br />length the section, The fencing would be primarily stock fencing with some <br />wire mesh fencing, The wire mesh fence would be used where the canal <br />parallels or crosses main roadways. <br /> <br />E, Cross-drainage Facilities <br /> <br />Cross-drainage culverts would be replaced in kind to protect the canal <br />from flood damage, They would be designed to handle the stormflows expected <br />from a 25-year frequency storm for the canal reaches down to 50-cfs capacity, <br />The reaches which have a 50-cfs capacity or less would be designed to pass the <br />10-year frequency storm, ~ <br /> <br />30 <br />