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• <br />• <br />• <br />PROJECT: FLOW FROM GLOBE HILL MINE TO SCHIST ISLAND MINE <br />AUTHOR: Adrian Brown, P.E. <br />DATE: 9/5/2008 <br />PAGE: 3 OF 4 <br />ANALYSIS (continued) <br />Anisotropic hydraulic conductivity <br />Evaluation is fnr tho fi dl ronnc of -i-+-- t,.- u._ <br />Cmmnuto wafer term+h 11- OMI-k- uni <br />- -- -------•- ..,. .. .. <br />Vertical Hydraulic conductive of rock . . v. ..m rv <br />f t wal 15%,Q 411 ti 1C ulduume. <br /> <br />Horizontal hydraulic conductivity of rock r <br />ft/ r 10 <br />1 10 10 10 <br /> <br />Anisotropy Kh/Kv <br />ratio <br />0 <br />1 10 <br />1 100 1000 <br /> . 10 100 <br />Compute lateral flow from Globe Hill to east <br />Lateral flow assumed in a strip of rock between the top of the water in GH and the top of backfill in SI. <br />Flow section width equals inundated Globe Hill Mine floor normal to the flow direction. <br />Flow is computed from Darcy's Law: <br />0 = Kh I A ki, In-A ., .r,. . a. _.:..:... <br />Catchment area of Globe Hill Mine s .ft. 3537709 3537709 3537709 3537709 <br />Area of base of mine s .ft. 159736 159736 159736 1597 <br />36 <br />Precipitation event assumed 24 hr max in 12 12 12 , <br />12 <br />Volume of water to Globe Hill Mine cult 3537709 3537709 3537709 3537709 <br />Runoff coefficient % 100% 1000 100% 100% <br />Depth of water in mine floor ft 22.1 22.1 22.1 22 <br />1 <br />Elevation of Globe Hill mine floor It 9865 - 9865 9865 . <br />9865 <br />Maximum Elevation of water in GH mine floor ft msl 9887 9887 9887 9887 <br /> <br />Horizontal hydraulic conductivity Kh ft/ r - .. U1 aU11 fOUIVI]I h = area <br />rIOw <br /> <br />Maximum Elevation of water in GH mine floor ft msl <br />9887 10 <br />9887 100 <br />9887 1000 <br /> <br />Elevation of backfilled Schist Island Mine ft msl <br />9795 <br />9795 <br />9795 9887 <br />9795 <br />Head loss from GH pool to SI backfill max ft- 92.1 92.1 92.1 92 <br />1 <br />Distance from GH pool to SI wall fr. CAD ft 928 928 928, . <br />928 <br />Hydraulic gradient 1 ft/ft 0.099 0.099 0.099 0.099 <br />Depth of lateral flow rock section ft 92.1 92.1 92.1 92 <br />1 <br />Width of lateral flow in rock from CAD ft 590 590 590 . <br />590 <br />Cross sectional area of flow GH>SI A s .ft. 54367 54367 54367 54367 <br />Lateral flow from GH towards SI max cult/ r 5398 53984 539844 5398443 <br />rn 0.08 0.77 7.68 76.83 <br />Compute vertical loss of flow during transit from Globe Hill towards Schist Island <br />Diatreme is unsaturated for approximately 3000 feet below GI and SI area <br />Any water entering the bedrock in this area is subject to vertical flow under gravity <br />Flow is computed from Darcy's Law <br />-- --`---- --••----•- <br />Vertical hydraulic conductive Kv •- <br />ft/ r . -..-U..N <br />10 IOUIVI 11 <br />10 P%- Area V? <br />10 now <br /> <br />Vertical hydraulic gradient 1 <br />ft/ft <br />1 <br />1 <br />1 10 <br /> <br />Distance from GH pool to SI wall fr. CAD <br />ft <br />928 <br />928 <br />928 1 <br />928 <br />Width of lateral flow in rock from CAD ft 590 590 590 590 <br />Cross sectional area of flow GH>SI A s . 547520 547520 547520 547520 <br />Vertical flow loss from GH to SI 5475200 5475200 5475200 5475200 <br /> 78 78 78 78 <br />Evaluate Intaral finw to c1 frnm emu <br />Flow from SI to GH m 0.0 0.0 0.0 0 <br />0 <br />Distance of penetration towards SI from GH ft 0.9 9.1 91.5 . <br />915.0 <br />Percentage of total distance GH-SI covered % 0% 1%1 10% 99% <br />Adrian Brown Consultants, Inc., 130 West Fourth Avenue, Denver, Colorado <br />303-698-9080