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The same computation of pressure on the synthetic liner used in this case was reviewed and <br />accepted in 1994 when the transition was made from CAT 773 haul [rucks to over-the-road <br />equipment to haul Drain Cover Fill. The OMLR's computations reported in its letter of March <br />25, 1996 are valid for instantaneous loads, but would be compared to the liner load testing rather <br />than the average load criterion developed by Golder Associates. Plus, of course, CC&V has <br />prohibited the type of equipment maneuvers that could lead to the exertion of excessive pressure <br />to the Drain Cover Fill. <br />The OMLR asked the source of the maximum tractive shear loading force operating on medium <br />compacted gravel. The maximum tractive shear force of 50 percent was obtained from the <br />equipment manufacturer (Caterpillar Equipment, personal communication, February 21, 1996) <br />for tested material also specified by the manufacturer, which, in the view of the design engineer, <br />best represented the Drain Cover Fill as it was placed. <br />4. Location of Vibrating Wire Piezometers in Phase II Low Volume Solution Collection <br />S sy tem• <br />The two vibrating wire piezometers will be installed within the Low Volume Solution Collection <br />System to supplement the pressure transducers that will be installed along with the pumps. The <br />wires from the two vibrating wire piezometers will be run to the highest point of the pregnant <br />solution storage area on the upstream face of the Phase II toe berm. This minimizes the <br />potential for the area of the liner boot for these wires as they pass through the upper synthetic <br />liner to be saturated. These vibrating wire piezometers, because of their dependence on three <br />variables and resultant propensity for variability due particularly to barometric pressure, will be <br />used to supplement the pressure transducers. <br />One of the two piezometers will meet the specifications of the existing vibrating wire <br />piezometers. The other will be somewhat more sensitive version of the same model. The <br />precision of these will be a function of the temperature and barometric pressure in addition to <br />the depth of fluid. The locations of the two vibrating wire piezometers are show in Attachment <br />2. They are located away from the inFluence of the Low Volume Solution Collection Pumps, <br />which places them north of the LVSCS pump intakes. <br />In order to facilitate slotting of the pipes that house the pumps, a second sketch shows that the <br />slotted piping will be extended farther into the sump area. This is possible in Phase II because <br />the pipes may pass between the overlaying pregnant solution pump wells. In Phase I, the piping <br />was slotted along a segment of the pipes that extended up from the sump because the pipe <br />extended a shorter distance into the sump area. <br />The Cripple Creek & Victor Gold Mining Company requests that the appropriate OMLR <br />representatives meet immediately with CC&V, representatives of the design engineer, and the <br />construction engineer to ensure that CC&V has answered all questions in a manner satisfactory <br />9 <br />