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1993 Annual Hydrologic Report <br />Page 7 <br />The reduced flow into the 7 West sump has resulted in reduced <br />flows from seepage at location 19. Flows at locations 27 thru 31 <br />are a result of new development in the mine. Water from <br />locations 29 and 30 dump into the No. 3 South Sump. Overflow <br />from the sump may flow down to the pump at location 25 and would <br />be measured at that location. In most cases the conductivity <br />continued to be similar to previous readings. At location 6, <br />conductivity increased due to it being in contact with recently <br />exposed rock from the panel caving. At location 15 the <br />conductivity increased last year for the same reason but this <br />year the conductivity decreased, probably due to flushing of <br />minerals from the newly exposed rock. Conductivity at locations <br />11, 17 and 26 may have increased due to a decrease in flow <br />corresponding to a concentration of salts through infiltration or <br />evaporation. The mass average pH and conductivity for these <br />inflows is 8.7 and 947 umhos/cm respectively. Table M93-3 was <br />prepared to estimate the total inflows and discharges from the <br />Roadside Mine but does not include the water consumed for mining <br />purposes as discussed in the Consumptive Use section of this <br />report. For the inflow calculation, an attempt was made to <br />account for water level changes in the old portions of the mine. <br />Negative values of "water level" flow represent periods when the <br />water level was decreasing as a result of discharge being greater <br />than the inflow. The calculated inflows for September were 331.5 <br />gpm which is surprisingly close to the 321.3 gpm measured. Using <br />the average pH, conductivity and discharge for 001 and 002, the <br />mass average pH and conductivity discharged was 7.4 and 3598 <br />umhos/cm. The water quality information for location 5 on data <br />pages MA-4&5 was taken as an indication of what could be pumped <br />from the No. 2 west portals if appropriate revisions to CDPS <br />permit were made. Diagram G93-1 was prepared as a trilinear <br />representation of this water and shows it to ba a Na HCO3 type. <br />Again only minor changes occurred at the Cameo No. 1 Mine. <br />Location 1 is from underdrains in the portal decline and has an <br />alluvial source. The lower conductivity was likely related to <br />higher runoff in the river this year. Flow measurements at <br />location 3 were resumed due to a change in the pumping pattern. <br />Location 7 is no longer accessible due to the area being sealed. <br />Location 8 represents water in an old portion of the mine. <br />Dewatering of this sealed area is random and not measured. Flow <br />at this location is estimated by subtracting the measured inflows <br />from the average September discharges. The mass average pH and <br />conductivity for these inflows was 8.0 and 2819 umhos/cm and the <br />averages for the mine discharge were 8.5 and 2393 umhos/cm <br />respectively. The apparent quality improvement for discharge may <br />• indicate an inaccurate balance of flows between location 1 and <br />location 8 (location 1 has always been difficult to measure) <br />and/or may be related to the discharge schedule for location 8 <br />