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Water quantity or flow measurements were conducted by a number of methods. At <br /> the beginning of the program, a straight, flat, stable reach of each stream station was <br /> selected as a sampling location. Near the downstream end of the reach, a cross-section <br /> was surveyed perpendicular to the stream flow and permanently marked with stakes and <br /> flagging. Flow was measured with a Teledyne-Gurley Model 625 Pygmy type current <br /> meter using the USGS six-tenths-depth method. At the mine discharge stations, discharge <br /> was measured by the pump ratings or by a direct volumetric measurement with a <br /> calibrated container. In Apache and Santistevan Canyons, calibrated flume stations were <br /> constructed and Stevens Type F continuous recorders were installed. During each visit to <br /> these two stations, the recorders were visually inspected and maintained. This included: <br /> 1. Checking to see that the clock mechanism was functioning properly and marking the <br /> recorder charts with data points; <br /> 2. Comparing the staff gage reading and recorder stage height to verify proper <br /> functioning of the stage recorder; <br /> 3. Removing the chart from the recorder indicating the station, date, time, stage <br /> height, and initials of the person servicing the recorder; and <br /> 4. Back-flushing the inlet pipe to prevent sediment build-up and clogging. <br /> 2.2 Ground Water <br /> Monthly ground water samplings were conducted at each of the six designated <br /> stations PAW-1, PAW-2, PAW-5, PAW-6, CCAW-1 and ACAW-1 during the last week of <br /> each month. The Purgatoire alluvial wells PAW-1, PAW-2, PAW-5 and PAW-6 have been <br /> in place for a number of years. Stations CCAW-1 and ACAW-1 were completed during <br /> April 1984. <br /> Depths to water below the top of the well casing was measured to the nearest <br /> r hundredth-foot using an electric line water level detector. The elevation at the top of the <br /> rGoire, <br /> well casing was subtracted from the depth to water to obtain the ground water level <br /> below the ground surface. <br /> Water quality was sampled in the field directly from the wells with a hand bailer. <br /> The wells were cleared by bailing at least three columns of water prior to collecting the <br /> sample. Equipment and procedures used for water chemistry analysis were consistent <br /> with those described above for Surface Water. <br /> -7- <br />