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Section 2 <br />Drainage 00171101Design <br />Table 2- <br /> <br /> <br />Basin 4 Calculation s <br /> <br /> <br />Basin Area umma Tv <br />100-yr, <br />24-hr <br />Storm r oenna <br /> <br /> <br />Runoff <br /> <br />Runoff <br />Volume <br /> <br />Retention <br />Area <br /> <br /> <br />erm Height <br /> Calculated Freeboard Desi n <br /> s -ft ac in in ft s -ft ft ft ft <br />2 153,788 3.53 3 1666 21 274 63 924 0.33 1.00 1.33 <br />3 30,467 0.70 3 1.66 4,215 13 084 0.32 1.00 1.32 <br />• <br />2-5 <br />T:v6498&Denisw Mine.%Task Order I - Sunday Mines Drainage Stu"Van 4 Mine Drainage Study\Repurt V-4 Mine Drainage Report_final.d-c