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peak velocity was below the limiting velocity of 5.0 fps. Below is a summary of the input factors and <br />the results determined by the computer program. <br />Channel Factor <br />Channel AA -AA' <br />Q <br />31.38 cfs <br />Z (side slopes) <br />10:1 <br />Shape <br />Trapezoidal <br />n <br />0.030 <br />Limiting Velocity <br />5.0 fps <br />Slope <br />0.0413 fttft <br />Results <br />Normal Depth (dn) 0.37 ft <br />Flow velocity 4.58 fps <br />Channel width 15 ft <br />Results <br />Based on the above results, the reclaimed drainage channel will have a minimal width of 15 feet <br />and gently sloping sides. The bottom will be relatively flat with minute channeling. Added rock may <br />be placed for energy dissipation. A trapezoidal channel with a minimum bottom width of 15 feet and <br />1 Oh:1 v or flatter side slopes and no free board simulates this condition. The actual width will vary <br />from 15 feet up to 100+ feet. This typical cross section or one with the same or larger cross <br />sectional area, will be used for the entire channel reach. This will insure that the velocity will be <br />below the limiting velocity of 5.0 fps, since the peak flow was determined at the downstream end <br />of the reclaimed drainage channel. No free board was calculated because minimal, if any damage <br />will occur if the flow does leave the banks for short periods of time. <br />The reclaimed drainage channel will be topsoiled and revegetated according to Section 2.05.4(2)(d) <br />and (e). <br />(Revised July 2006) Attachment 2.05.4(2)(c) -1 -3 <br />