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Gold liill Mill ~deauacv Rwviwv Rw•nonww j!j,aX X1995 <br /> Mhtlmm~ WWIY Wldlh Ma:lm® Flow <br /> Depth [.eft Right Sbpe Flaw Dtrpth <br />Dhch Nr~bar R~re[t (feet) (feel) (faep (RJftl fCFSI (feed <br />I 1 10 0.73 0.75 0040 f.53 O.gg <br />l 2 I.D 0 7S D.'3 O 140 1.3J 0.66 <br />2 I 1.0 0 73 0.73 0.027 O. l3 U.36 <br />3 t l.0 0.73 0.75 0 02l 0.33 0.63 <br />7 2 I.0 0.73 0.75 0.123 0.33 0.43 <br />c) Ted Zurich Associates did na certify the drvenion ditches above the tadirtgs impoundment <br />2a. aj COM, Ino does not believe that s 24 inch capillary bema is cost effective err necessary. According to <br />Dsvid Todd Ph.D., profeswr of Civil E,tµi+tecrutg at dre Urrirasily of Califuurar, Berkeley, ur Iris bwk <br />Groundwater Hydroloav. "the capillary zone extends from water teWe up to the limn of capillary rix of <br />water. Several invesagstors Have studied the nx end distribution of water N the capilL[y zone in terms <br />of the properoas of porotu medis. "Ihe capillary rise ranges from a [isction of en inch m gravel to ee <br />much as a foot in send". The et7ectivrnns af'tiveg graded rock" es a capillary battier is Doty in the <br />range of a fraction of on inch to an inch. Becaux of t}ru tumted usefulness of the gravel as a Caprllery <br />battier, we only propose to put on 2-inches of'Yrell graded rack" For reclamation as a capillary bemer. <br />b) CGM, lac. will commit to the tnatellehon of a leya of geetextile fabnc over rite tailing surface before the <br />rock h placed. COM, Inc. owns rnough geotextile fabric w corer ttte tailings and will store the fabric in <br />the mill for reclamation. Uutallation cost will be added to the reclamaton cost estimate <br />23 The Division is correct that groundwater flow rates cannot be dekrrrtined from the elevation information <br />taken fottn the Bureau of Mines wells. We do not believe that anything useful would be determined by <br />doutg pump testa on the omega to detetrrtine Bow rates. The water table variations aze influenced by xaaonal <br />venetions in the frecttaed petite that hea very low water storage eapeeiry The Cold HID mill will Continue <br />to monitor and report perbnrnt water quality parameter even though the continued sampling of water has <br />shown na degradation in water quality. <br />?6. COM, Inc will set up n monitoring program ftx the Gold Hill MiU with a file located at the mine end a copy <br />srnt to the Division yearly in the Annual Report. The following parameters rvifl be monitored and reported <br />to the Division: <br />Parrteiatar Fnarrtxy et Maatga~ <br />s) Groundwsler quatiry and water rabic elewtion Quarterly <br />bl Wetcr level and avrtilrsble storage cepadty in undetgound <br /> storage reservoirs Quarterly <br />ci Underpowd water storage bulkhead stability Quarterly <br />d) Flvtctiortalrry of the tatJvrgs dwarf pipes Monthly <br />el Tailings impowdme»t tteebeard, water balance, stability <br /> of the embankment, security, and liner inkgriry. Once per month while rdk <br /> Weekly when operatutg <br />t) Tailings line f[om mill W impoundment to usure it l6 not <br /> kaking Daly when operating <br /> No checks whrn idk <br />~ Obaervationa for lealtatg fanka N mill btlikling and other <br />containment feoilities Once per month what idle <br />Once per day when operating <br />h) Observe Left Hand Creek water line for Leaks Once per week what operating <br />No checb when idk <br />