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Memorandum to Greg Rous11 <br />March 23, 2001 <br />Page 4 <br />p..:,..,, . . <br /> <br />'able 1 -Maximum 365 Day [ <br />Transmissvity (gpolfl) _ <br />Theoretical Pumping Rate (gpm) _ <br />Specific Yield = <br />EsUnated Pil Dewatering (fl) <br />50000 gpoln <br />750 <br />0.2 <br />15 <br />from Pit Center <br />Distance <br />from Pll <br />Maximum Maximum <br />Tlreoreticel Expeeled <br />Theoretcal P4 Center = 1 31 15 <br />Edge of Pit = 118 13 7 <br />300 10 5 <br />500 B 4 <br />700 7 3 <br />900 6 3 <br />1100 5 3 <br />130D 5 2 <br />1500 a 2 <br />1700 4 2 <br />1900 3 2 <br />2000 3 2 <br />Table 2 -Maximum 365 Day Drawdown <br />Transmissvity (gpd/ft)= 100000 <br />Theoretical Pumping Rete (gpm) = 1375 <br />Specific Yield = D.2 <br />Estmaled Pit Dewelering (ftj = i5 <br />Maximum Drawdown at Dislance'r fiom Pit Center <br />rstance Maximum petted <br />from Pit Theoretical Drawdown <br />Center (tt) Drawdown R) (ft) <br />Theoretical Pit Cenler = 1 29 15 <br />Edge of Pil = 118 13 7 <br />300 10 5 <br />500 B 4 <br />700 7 4 <br />900 7 3 <br />1100 6 3 <br />1300 5 3 <br />1500 5 3 <br />1700 5 2 <br />1900 4 2 <br />ZODO 4 2 <br />Table 3 -Maximum 365 Day Drawdown <br />Transmissvrty (gpolft) = 200000 <br />Theoretical Pumping Rale (gpm) ~ 2500 <br />Specific Yield = 0.2 <br />Eslmated Pit Dewatering (fl) = 15 <br />Maxirnurn Drawdown al Distance'r" from Plt Center <br />gpd/R <br />pistance Maximum Maximum <br />kom Pit Theoretical Expected <br />Center h Drawdown it) Drawdown (R <br />Theoretiral Pit Center = 1 27 14 <br />Edge o1 Pit = 11 B 13 6 <br />300 10 5 <br />500 8 4 <br />700 8 4 <br />900 7 4 <br />1100 6 3 <br />1300 6 3 <br />1500 6 3 <br />1700 5 3 <br />1900 5 2 <br />2000 5 2 <br />LEONARD RICE GONSULTIHG WATER ENGINEERS. INC. <br />