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Interoffice Memorandum <br />Tables <br />Table 1 <br />Ditch Measurement Location <br />Ditch Measurements <br />Clean Water <br />RPEE <br />Slope <br />Width <br />Depth <br />Width <br />Depth <br />% <br />Base of Slope <br />10' <br />2' <br />- <br />- <br />- <br />180' <br />- <br />- <br />10' <br />3' <br />17 <br />480' <br />10' <br />1 4' <br />1 10' <br />1 5' <br />1 15 <br />630' <br />8' <br />5' <br />5' <br />3' <br />- <br />Base of Buttress <br />10' <br />6' <br />5' <br />3' <br />- <br />Table 2 <br />Permitted Ditch Dimensions* <br />Clean Water <br />RPEE <br />Slope <br />Width <br />Depth <br />Width <br />Depth ** <br />% <br />3' <br />1' <br />5' <br />1.93 <br />20 <br />* Permitted ditch designs are minimum dimensions allowed. <br />** Based on 100 yr. - 25 hr. storm event and minimum 0.5' freeboard. <br />Table 3 <br />Buttress Dimensions <br />Measured <br />Permitted (Phase 1) <br />Length <br />Depth <br />Slope % <br />Length <br />Depth <br />Slope % <br />225' <br />60' <br />58 <br />— 300' <br />75' <br />66.67 <br />Table 4 <br />Refuse Pile Slope % <br />Measured <br />Permitted <br />RPEE <br />51 <br />40 <br />RPE <br />40 <br />40 <br />