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625 Pygmy type current meter using the USGS six-tenths-depth method. <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 was measured <br /> by the pump ratings or by a direct volumetric measurement with a <br /> calibrated container. When in operation, calibrated flume stations <br /> utilize Stevens Type F continuous recorders. During each visit to the <br /> flume stations, the recorders are visually inspected and maintained. <br /> When in operation, the following maintenance schedule is 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 nine designated stations PAW-1 , PAW-2 , PAW-3 , PAW-4, PAW-5 , PAW-6, <br /> PAW-7 , CCAW-1 and ACAW-1 during the last week of each month . The <br /> Purgatoire alluvial wells PAW-1 , PAW-2, PAW-5 and PAW-6 have been in <br /> place for a number of years. Stations CCAW-1 and ACAW-1 were completed <br /> during April 1984 while PAW-3 and PAW-4 were completed in April 1985. <br /> Well PAW-7 was installed in September 1988 as a result of installation <br /> of Pond 005. During 1988 all wells (except PAW-7) were sampled on a <br /> quarterly basis. Samples were taken in February, May, August and <br /> -10- <br />