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West Elk Mine 2011 Annual Hydrology Report 17 <br />was relocated upstream to replace the previous site that was frequently flooded by beaver <br />dams. MCC initiated new monthly baseline monitoring of this relocated site in WY 2006 <br />and routine monitoring (three times per year) began in WY 2007. The Lower Dry Fork <br />Flume was replaced in its same location in October 2006 (WY 2007). Monitoring at the <br />Upper, Middle, and Lower Dry Fork flumes began in 1977. A flume and data logger was <br />also installed in October 2006 just upstream from and above the high water line of <br />Minnesota Reservoir (see section 3.1.4.2: Minnesota Reservoir Flume). <br />3.1.3.3 Poison Gulch <br />Poison Gulch is an ephemeral stream that is tributary to the Dry Fork and only <br />flows in response to storm events and spring runoff. Poison Gulch flows into the Dry <br />Fork between the Middle and Upper Dry Fork monitoring stations. Poison Gulch is <br />located in the SOD mine plan area. The Poison Gulch monitoring station was established <br />as a new monitoring location in the spring of 2005 and does not have a flume or data <br />logger (Map 2). Baseline monthly monitoring of Poison Gulch began in May 2005 and <br />included measuring flow, collecting field water quality data, and collecting samples for <br />laboratory water quality analyses from May through October 2005. Routine monitoring <br />(three times per year) of Poison Gulch began in WY 2006. <br />3.1.3.4 Deer Creek <br />Deer Creek is an ephemeral stream that is tributary to the Dry Fork and only <br />flows in response to storm events and spring runoff Deer Creek flows into the Dry Fork, <br />upstream of the Minnesota Reservoir Flume monitoring station and downstream of the <br />Middle Dry Fork monitoring station. Deer Creek is located in the SOD area. The Deer <br />Creek monitoring station was established as a new monitoring location in the spring of <br />2005 (Map 2) and does not have a flume or data logger. Baseline monthly monitoring of <br />Deer Creek began in May 2005 and included measuring flow, collecting field water <br />quality data, and collecting samples for laboratory water quality analyses from May <br />through October 2005. Routine monitoring (three times per year) of Deer Creek began in <br />WY 2006. <br />June 2012 HydroGeo, Inc. <br />