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West Elk Mine 2011 Annual Hydrology Report 19 <br />monitoring of the Deep Creek Ditch flume began in the summer of 2006 and included <br />measuring flow, collecting field water quality data, and collecting samples for laboratory <br />water quality analyses from the installation date through October 2006. Routine <br />monitoring (three times per year) at this site began in WY 2007. Data from this station <br />will provide information on trans -basin flows versus natural flows in Dry Fork and Deep <br />Creek. <br />3.1.4.2 Minnesota Reservoir Flume <br />MCC installed a new 30 -inch Parshall flume and a data logger on the lower Dry <br />Fork above the high water line of Minnesota Reservoir in October 2006 (beginning of <br />WY 2007). The Minnesota Reservoir Flume monitoring station (Map 2) provides more <br />accurate and more representative monitoring data than the Lower Dry Fork flume, since it <br />isn't influenced by variations related to reservoir activities. Baseline monthly monitoring <br />of the Minnesota Reservoir Flume began in the spring of 2006 and included measuring <br />instantaneous flow, collecting field water quality data, and collecting samples for <br />laboratory water quality analyses from April 2006 through October 2006 (CDMG, 2006). <br />Routine monitoring (three times per year) at this location began in WY 2007. In WY <br />2010 this flume was relocated nearby to better avoid beaver activity. <br />3.1.4.3 South Prong Creek <br />South Prong Creek is an ephemeral stream that is tributary to upper Minnesota <br />Creek. The north fork of South Prong Creek drains the southern portion of the SOD mine <br />plan area. The monitoring station on South Prong Creek is located at the mouth of the <br />drainage (Map 2) and does not have a flume or data logger. Preliminary flow and water <br />quality data were collected during a one time sampling round of this site in 2005 <br />(HydroGeo, 2006). Baseline monitoring is scheduled to resume in about 2017, or at least <br />one year prior to when mining begins in the area to monitor potential mining induced <br />impacts. <br />3.1.5 Temperature Monitoring Sites <br />The surface lands of the West Elk Mine are drained to the north by the North Fork <br />of the Gunnison River. Water from the mine water pumping facility (MWPF) discharge <br />point enters the North Fork of the Gunnison River via Sylvester Gulch. In September <br />June 2012 HydroGeo, Inc. <br />