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<br />. <br /> <br />The channel improvements would include a combination of open <br /> <br /> <br />channel construction and culverts. A total of l.l miles of open, <br /> <br /> <br />grasslined channel with a 6-foot-wide concrete trickle channel <br /> <br /> <br />would be constructed. The remaining 3,700 feet of improvements <br /> <br /> <br />would be twin, reinforced concrete culverts. Pertinent data for <br /> <br />the channel improvements are presented in table 3. <br /> <br />Table 3 <br />Pertinent Data <br />Downstream Channel Improvements <br /> <br />Total Length <br />Open Channel <br />Culvert <br /> <br />1.8 miles <br />1.l miles <br />0.7 mile <br /> <br />Average Channel <br />Depth <br /> <br />4.7 feet <br /> <br />Average Top Width <br /> <br />64 feet <br /> <br />Drainage Channel Improvements Into Upper Lowry Dam. This <br /> <br /> <br />component would be the responsibility of local interests but <br /> <br /> <br />would be required for the Federal action. Because these improve- <br /> <br /> <br />ments would be on Federal land and because of the relationship to <br /> <br /> <br />Upper Lowry Dam, these channels would be federally constructed <br /> <br />with a cash contribution from local interests. The channel from <br /> <br /> <br />Pond A-B, the golf course drainage channel, passes through the <br /> <br />base golf course and its alignment is designed to avoid inter- <br /> <br /> <br />ference with the golf course as much as possible. The bottom <br /> <br /> <br />width would be lO feet and the side slopes would be 1 vertical on <br /> <br /> <br />lO horizontal. The channel would carry the runoff from a lO-year <br /> <br /> <br />storm, and in most places, small levees with the same flat side <br /> <br />33 <br /> <br />. <br />