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TITANEnvironmental <br />By PJA Date 1/22/96 Subject: Calculate g.w. flux at Mayflower Page 2- of 3 <br />Chkd By Date 112,30& Tailings: Ratio to Tenmile Cr. discharge Proj No 4104 -001 <br />Saturated thickness of the aquifer (b) was taken as the difference between the <br />bedrock elevation and the static water level (swl) in the wells GMW -1 and <br />GMW -2 (Figure 2, 3). <br />Depth to bedrock was determined during drilling. Static water levels were <br />reported in an internal report on June 28, 1993. <br />Ground water and bedrock elevations (in appendix): <br />Well surface <br />elevation(ft) <br />GMW -1 10360 <br />GMW -2 10260 <br />Well SWL <br />elevation(ft) <br />GMW -1 10343.5 <br />GMW -2 10245.5 <br />Flux Area (A): <br />A =wb <br />A= 1000 ft x 67.4 ft <br />A = 67,400 ft <br />Ground Water Discharge (Q): <br />SWL <br />(ft) <br />16.5 <br />14.5 <br />depth to <br />top of bedrock (ft) <br />97.2 <br />68.5 <br />bedrock saturated <br />elevation(ft) thickness (b) <br />10262.8 80.7 <br />10191.5 54.0 <br />Average = 67.4 ft. <br />Hydraulic Gradient (dh/dl): <br />The hydraulic gradient through the flow field was calculated between wells <br />GMW -1 and GMW -2: <br />Distance from GMW -1 to GMW -2 = 3170 ft. <br />dh = 10245.5 - 10343.5 = - 0.0309 <br />dl 3170 <br />Q = -K A (dh /dl) <br />Q = - 2.9 x 10 ft/s x 67400 ft x - 0.0309 <br />Q = 0.0604 ft3 /s <br />