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tKKt''~1 <br />1 <br />computed. <br />• 2) Clearwater and contaminated water ditches were designed for the area on top of the <br />pile and pipes were sized to carry this runoff down the face of the pile. <br />3) The pond volumes were evaluated and outlet works resized. The ponds were <br />connected to act as one large pond. <br />4) All other affected drainage ditches and pipes were checked for adequate size. <br />REVISION 3 -December 1997 <br />Changes to the drainage system include the fallowing <br />1) Originally runoff from on top of the waste pile was transported down the pile face in <br />pipes. This has been changed to armored open channels. <br />2) A section of pipe in the yard drainage system has been rerouted. <br />REVISION 4 -January 19987 <br />The 36" concrete pile, reach 7, was rerouted and replaced with a 24" CMP. <br />n <br />LJ <br /> <br />January 1998 <br />