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-rosily <br />~haractetjz lion <br />2 <br />~-- March 12, 2004 <br />Permit No,114-1999.0p2 <br />f°et without causing caging o ft$e <br />dissolution <br />surface water bearin cave rooF(erow <br />of the g strata. n i <br />avlti criteria that ~. Hence there should be no~hete near the aleya <br />Prevent c ssnCO'mum intact p~~ cvdt the mined land recl adverse impacts to ground wta er. <br />collapse in th mmunication h of50 feet amation <br />taus a direction of °f the Irani must be p°rmit is <br />ed, for °x. the dissolution g fluids maintained behveepacing bet cave ad <br />ample b artd the potential for n ~Jacent Jacent <br />requirement to tend Y more rapid disso surface The unacce hies to <br />stables uct cavity ch lotion extent ofcavit ptable <br />widt pacing for adjacent ~'acterization, ofnch ^aheolite be Y width variatioan aunts ofcavity <br />h could be solution Once the she ds, is the that may be <br />characterized ~ maintained while mining wells could pe °fthe caviti shisf r°ason for t <br />maxim date, it co maxirniZ1n be established batter understood <br />um minin old be argued g resour°° rec°v° such that the <br />mined wells g diameters b that chatact rR Since no ° minim ' a <br />with no other °Yond 200 fe erization sh avitY she um intact pillar <br />et. ould <br />24 cavity and any rho ° wells closer H°wevcr precede an a pes have been <br />reach SSO feet di avities ofthe than 600 feet. 29'24 is retell pProval to <br />info ameter four solution As a rosult, the Y isolated from an expand the <br />' DMion provided by Am1eh is so unlike! minin maxi <br />feet g wells that mum di Y °Cher solution <br />ncan So Y as to be unto are 600 feet ameters of the <br />No solutio can apprOV°minin ~ and the fact that t nceivable, distal, 9- <br />would we112 <br />been obey n mining of wells closer the w@1129_ Based on the haV° to <br />acterize . here al'e rock meth <br />Soda d It is an 400 f 24 °avity to a diameterr of22 ~emnbg wells closer than 600 <br />> that EP mY understandin eel to well 29_ <br />Since there is uo~d $L117 have also in ga bas 24 °~ occur until aced <br />technical re estriction dicated the on a °pmmunication &o after on volume <br />current] at the the 29-24 tries <br />a letter vision does not a Y contained i Y will approve t m Ed Coale cavity has <br />28- u amati g die an <br />21 ca~ibMG req esting appear to be neeessarn the r°°I °n he 1~ er meter f f~e~c~ <br />Y DMG should Pproa leaf ~pPro Y to mm nehis 24 permit f~ Wean ode or the c~ ~> a <br />issue era Posal to 29 pp °val. cavity <br />Once the wo1128_ t° 22S fe will be sending <br />mach 21 cavil vzng these proposals, et and to ch <br />antes reports ° Y has been ch aracterize the <br />evaluated, an be calib ~'acteriz~ the the well <br />can b This information rated and <br />e used to establish 'and info any variations o r<nal mechanical <br />be develo , ulti rmation fro n cavity width qv models from the A <br />pea. mately, the s m characterization er the vertical gapito rock <br />pacing for mini °f other profile can be <br />On another rig wells and Fells to occur in <br />b nudesting approtval~ o ~~ S°da submitted a 'rjaximum cavity diameters that~can <br />reduction b ert minin letter on F <br />EP °mmend DM ased on reduced 1 g we1120_l2 to a ebruary 9, 2004 <br />A and BLItiI G issue a letter pegging and ab monitoring well. (dated Februa <br />will he 1 <br />have or also approval oft p ~ dQ cment costs folio rig h ~ S4da will o00ask for a <br />attachments Aprov° this onvert well 2 _ well cony <br />cc. ) proposal. 0 12. It is mY understanding that <br />Carl Mounr DMG (via 'mail and w/o atJachlnent <br />c; tacsICOANER MACn~E~Y no <br />Curr~n~~m Soda cavity charecferizatian,dop <br />