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PRACTICAL PUMPING RATES <br /> The maximum practical pumping rate for newly constructed dewatering wells was calculated <br /> based upon a range of assumed aquifer characteristics and two-thirds well drawdown. Table 4.3 <br /> summarizes estimated maximum pumping rates for various length pumping periods and aquifer <br /> characteristics discussed later in this report. Based upon a ]-year pumping period, the range of <br /> expected maximum well pumping rates is 1,849 gpm to more than 2,500 gpm. <br /> Table 4.2 —Wells Within 600 Feet of Pro osed Dewatering Wells <br /> Permit No. Owner Depth (ft) Pumping Rate Proposed Well <br /> (gpm) Within 600 feet <br /> 16163-F-R Keiser Henry 98 1000 South Nelson <br /> 159311--A Keiser Henry 95 15 South Nelson <br /> 14968-R Cogburn Earl 73 1200 Vine + 11th <br /> 14967-R Cogburn Earl 80 1000 SW <br /> 4838-F Hunt David W 98 2000 SW <br /> 630-R Nelson Thyra 90 800 West Basin <br /> 19957-R Western Equipment 70 1500 West Basin <br /> 14969-R-R Weld School District 80 1200 North School <br /> 432-WB Mcleod Royal 70 - GMP <br /> 47041-F Town of Gilrest 91 700 GMP <br /> 13119-F-R Town of Gilcrest 95 800 M+E <br /> Notes:Depth and pumping rate from Division of Water Resources well permit files. <br /> Table 4.3 — Su mary of Estimated Maximum Pumping Rates <br /> Saturated Maximum Rate /Pumping (days) <br /> Transmissivity Storage Radius Thickness (gpm) <br /> Period <br /> (gpd/ft) (ft) ft 1 7 30 180 365 1826 <br /> 100,000 0.2 1 90 > 2500 > 2500 2277 2039 1958 1796 <br /> 300,000 0.2 1 90 > 2500 > 2500 > 2500 >2500 >2500 IL >2500 <br /> Notes: Maximum drawdown is 213 of saturated thickness. Jacob equation is used for maximum pumping rate <br /> calculations. Transmissivity is adjusted for declining saturated thickness. <br /> 17 <br />