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Well Site Estimated Unconsolidated Estimated Estimated <br /> Saturated Materials Average Transmissivity <br /> Thickness (feet) Permeability (thickness x <br /> (ft/day) permeability) <br /> ftZ/da <br />#2 50 Sand on top of 50 2,500 <br /> cla <br />#3 60 Sand and clayey 30 1,800 <br /> sand <br />#4 20 Sand ravel 100 2,000 <br />#5 180 Sand and gravel 50 9,000 <br /> with cla lenses <br />#6 90 Sand and ravel 100 9,000 <br />#7 SO Sand with some 30 2,400 <br /> cla <br />#8 50 Sand and gravel 100 5,000 <br /> (buried drift) <br />#9 30 Fine sand 20 600 <br />#10 60 Sand (buried 30 1,800 <br /> drift) <br />#11 & #12 120 Sand with ravel 70 8,400 <br />#13 40 Sand with cla 25 1,000 <br />5.4 Estimated Well Yield for the Unconsolidated Aquifer <br />A (very) approximate estimation for maximum sustainable well capacity is: <br />Well Capacity (gpm) = T/267 x 0.3 x Saturated Thickness (where T is the transmissivity) <br />Well Site Estimate Well <br />Ca acit ( m) Well Site Estimate Well <br />Ca acit ( m) <br />#2 140 #8 280 <br />#3 120 #9 20 <br />#4 50 #10 120 <br />#5 1,820 #11 & #12 1130 <br />#6 910 #13 50 <br />#7 215 <br />Based on this estimations, the best well sites to install pairs of wells (one well in the Mt. Simon- <br />Hinckley Aquifer and one well in the unconsolidated aquifer) are Wells Sites #5, #6, and #1 1-#12. <br />These estimates must be used with caution because geologic conditions can vary sharply over a short <br />distance. These wells site would be could candidates for further evaluation. Wells Sites #2, #3, and <br />P:\Mpls\23 MN\71\2371 LOS Water Supply Alternative Study\FinalDeliverables\Alternatives_Report_final.doc 4,1 <br />