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Exhibit Page 27-A <br />Table G-3. Variables in the various calculations <br />Name Description Value (if <br />fixed Units Soume <br />K Permeability of aquifer (sand and gravel in place) 1300 CF/day-SF <br />fd s <br />k or k Coefficient of permeability 214 Fpd ~ e <br />L Influence distance for pit drawdown (initial), calculated as L=3.8(H-Ho)= <br />3.8 121-106 for ravi draina a into a draina a la er or collection i e 57 Feet g <br />H Normal depth of unconfined aquifer 121 Feet Dino <br />Ho 4 a Drawdown depth of unconfined aquifer at pit 106 Feet nitro <br />Hweo Drawdown depth of unconfined aquifer at well TBD Feet Dino <br />Do =H-Ho, Amount of drawdown at it wall 15 Feet Dino <br />Dweil = H-Hweii, Amount of drawdown at well TBD Feet olno <br /> inflow uantit , = k Do z12L=214 15 zl2 57 a22.37 dldayAf tp <br />qz total quantity of upward Flow, read from table using W/ Ho curve and x and <br />reading Y then calculating value z= k Do l2 2360 Cflday/If Dino <br />W Width of drainage area (pit) 660 Feet Dian <br />X = L+0.5W / Ho = 57+330 /106= 3.65, 3.65 NA oltro <br />Y = k H-Ho I z 0.68 NA uis0 <br />WI Ha Curve for Fi ure 12.15 round 6.22 NA 01"0 <br />qg Total upward flow into drainage layer, <br />=kDo IY 7.15 CF/day/LF ono <br />~m t+ total um ed er linear foot of it wall 529.5 CF/da /LF ono <br />Q ~m Q ~m x it erimeter 4107 1.76M CF/da °Ino <br />Amax Total pumped flowlmaximum quantity to pump for drawdown <br />D and to have drawdown ywell <2 feet at distance rweii, =1000 <br />ft. Q=><K Hweliz - Ho /In wwell - ro 1.76M CFlday , t <br />ro Distance to pit wall from pumping point 40 Feet Dino <br />rweil Distance to well from pumping point 1000 Feet nitro <br /> <br />r it-well Distance from It wall to well <br />P 960 Feet ono <br />a. Based on the above values for worst-case, resulting in dewatering pumping at a peak rate of 20.4 cfs, the <br />depression of the water table around the pit, particulady on the south side, is estimated as follows based on the <br />distance from the sump (pumping point), and with a total drawdown in the pit of 15 feet. All numbers are in feet: <br />Ae~eiv~d <br />s Tchobanoglous, et al. Water Resources Engineering. Fourth Edition, [TCH1] <br />~ Lindeburg, Civil Engineering Review Manual Third Edition, [LIN1] Table 6.2. <br />MAR 21 ?001 <br />Table 4-~~4~0 Mne a~8 Geo <br />081' <br />a Barksdale, Ed., The Aggregate Handbook, National Stone Assn., [NSA1] Section 12.1. <br />g NSA1, Equation 12-2. <br />to NSA1, Figure 12.15. <br />tt LIN1, Equation6.7. ("Druitequatfon") <br />Four States Aggregates, LLC 15 MAR 2001 <br />Application for Permit: Line Camp Pit M-2001-001 FSA-LCP-D2-001 <br />