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i <br /> During 1985 at the Purgatoire River stations, staff gages were <br /> established on bridges above, between and below the two mines providing <br /> data to calculate a stage-discharge curve for future discharge <br /> measurements. At the mine discharge stations, discharge <br /> was measured by the pump ratings or by a direct volumetric measurement <br /> with a calibrated container. When in operation, calibrated flume <br /> stations utilize Stevens Type F continuous recorders . During each <br /> visit to the flume stations, the recorders are visually inspected and <br /> maintained. When in operation, the following maintenance schedule is <br /> maintained: <br /> 1 . Checking to see that the clock mechanism was functioning <br /> properly and marking the recorder charts with data <br /> points; <br /> 2. Comparing the staff gage reading and recorder stage <br /> height to verify proper functioning of the stage <br /> recorder; <br /> 3. Removing the chart from the recorder indicating the <br /> station, date, time, stage height, and initials of the <br /> person servicing the recorder; and <br /> 4. Back-flushing and inlet pipe to prevent sediment build-up <br /> and clogging. <br /> 2 . 2 Ground Water <br /> Monthly ground water samplings were conducted at each of <br /> the eight designated stations PAW-1, PAW-2, PAW-3, PAW-4, PAW- 5, PAW-6, <br /> CCAW-1 and ACAW-1 during the last week of each month. The Purgatoire <br /> alluvial wells PAW-1, PAW-2, PAW-5 and PAW-6 have been in place for a <br /> number of years. Stations CCAW-1 and ACAW-1 were completed during <br /> April 1984 while PAW-3 and PAW-4 were completed in April 1985. During <br /> 1987 all wells were sampled on a quarterly basis. Samples were taken <br /> in February, May, August and November. The annual sample was taken <br /> during the November quarterly inspection. <br /> Depth to water below the top of the well casing was <br /> 9 <br />