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<br />I <br />I <br />I <br />I <br /> <br />I <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />, <br /> <br />I <br />I <br />I <br /> <br />-, <br /> <br />I <br />I <br />I <br />I <br />II <br />il <br />I <br /> <br />Main Channel - Drainaqeways <br /> <br />For'the most part, the primary drain- <br /> <br />ageway channels in the three basins are, well defined, have been <br /> <br />in existence for many years, and are presently being used as out- <br /> <br />fall points for smaller drainag,e systems, It is desirable that <br /> <br />this system be maintained in future design. This will be the most <br /> <br />economical way of removing water from the subdivided areas and <br /> <br />most major bridges already exist, This system has been continued <br /> <br />by this study, with all major channels being designed to carry the <br /> <br />lOO-year frequency flow as defined by the City of Colorado Springs, <br /> <br />The main channel of Cottonwood Creek <br /> <br />through the study area has been found to require a ISO-foot wide <br /> <br />bottom width, approximately 6,5 feet in depth including free board <br /> <br />and a 200-foot wide right-of-way, The right-of-way and bottom widths <br /> <br />would hold constant from the Woodmen Road bridge near Point 4 to <br /> <br />Monument Creek. The depth would be variable, reaching 8 feet at <br /> <br />the highway bridges at the west end of the basin. <br /> <br />The only problem area encountered) <br /> <br />using this widthJexists in an area about 1000 feet each side of <br /> <br />the Academy Boulevard bridge, In this area, subdivisions have <br /> <br />been platted on both sides of the channel, restricting its potential <br /> <br />width. It is believed that a 200-foot right-of-way can be obtained <br /> <br />in this area. If it cannot be obtained, then the widest practical <br /> <br />width must be used (up to 200 feet) and the channel deepened accord- <br /> <br />ingly, <br /> <br />-24- <br />