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CRDA #1 Perimeter Ditches -designed for 100-yr/24-hr event. DM #11 is 34.1 cfs and DM #12, <br />#13, and #14 are designed for 23.3 cfs. <br />-DM #11, #12, #13 and #14 contain riprap material. Using your dimensions, the ditch will carry <br />the designed flow and will not be erosive. The ditch in place is adequate. <br />Roadside Refuse Pile Ditch -designed fora 100-yr/24-hour event. DM #I S is 3.49-cfs, DM# I6 <br />is 3.49 cfs, DM#17 is 2.83 cfs, DM#18 is 2 cfs, DM#l9 is 2.36 cfs and DM#20 is .56 cfs. <br />The ditch will pass the designed flows, and will not be erosive. The ditch in place is adequate. <br />Let me know if you have any questions. <br />Enclosure(s) <br />cc: Larry Routten <br />c:\wp51 \misc\970912 <br />