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• TABLE 13-4 <br />DRAINAGE CONTROL STRUCTURES <br />Continued <br />• <br />NORTH DECLINE SITE (Exhibit 12C) <br /> CROSS <br /> SECTION <br />STRUCTURE EXHIBIT DESCRIPTION <br />Sediment Pond #7 22 Designed capacity 0.25 A.F., with at least <br /> 1 foot freeboard; embankment slopes <br /> designed at 1v:2h. <br />West Diversion Ditch Q2 Designed capacity 12.88 cfs, slopes <br />#1 designed at less than 1v:th, maximum <br /> gradient 4.6%. <br />East Diversion Ditch #1 P2 Designed capacity 1.36 cfs, slopes <br /> designed at less than 1v;1h, maximum <br /> gradient 3.5%. <br />East Diversion Ditch #2 22 Designed capacity 7.27 cfs, slopes <br /> designed at less than 1v:1h, maximum <br /> gradient 1.9%. <br />Channel 21 Designed capacity 470 cfs, slopes <br />Reestablishment designed at less than tv:2h, maximum <br /> gradient 7.5%. <br />Reclamation Collection Maximum design capacity 1.3 cfs, 1' deep <br />Ditches V-ditch with slopes designed at less than <br /> 1v:th, maximum gradient 7.5°/ <br />East Sump Design capacity 0.08 acre-ft. with at least <br /> 1 ft. freeboard; embankment slopes 1v:2h. <br />West Sump Design capacity 0.32 acre-h. with at least <br /> t ft. freeboard; embankment slopes tv:2h. <br />• <br />