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Exh. 7-14PP-4 Revision Date: 4/6/23 <br /> Revision No.: TR-159 <br />EP3 Inlet Ditch 0.68 4.8 Trapezoidal 12’ <br />bottom 2H:1V Riprap, <br />D50 = 3” <br />EP3 Outlet Ditch 0.34 3.6 Trapezoidal 12’ <br />bottom 2H:1V Riprap, <br />D50 = 9” <br /> <br />Final East Pit Ditch <br />Station Peak Flow <br />(CFS) <br />Average <br />Slope (%) Channel Type Side Slopes Erosion <br />Protection <br />Reach 1* 2.24 21.1 Trapezoidal 12’ <br />bottom 2H:1V Riprap <br />D50 = 6” <br />Reach 2* 3.47 10.0 Trapezoidal 12’ <br />bottom 2H:1V Riprap, <br />D50 = 3” <br />Reach 3 5.43 6.4 Trapezoidal 12’ <br />bottom 3H:1V Riprap, <br />D50 = 3” <br />* Within Reaches 1 and 2, at intervals determined by the field engineer intervals, stability <br />structures (gabion walls) will be constructed within the these reaches to ensure riprap lining <br />remains in place and the ditch functions as designed. <br /> <br />Section 16 Fill Ditch <br />Station Peak Flow <br />(CFS) <br />Average <br />Slope (%) Channel Type Side Slopes Erosion <br />Protection <br />0+00 to 8+60 0.64 17.8 Trapezoidal 12’ <br />bottom 3H:1V Riprap, <br />D50 = 6” <br />