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HYDROLOGIC CHARACTERIZATION AND MONITORING PLAN 19 <br />year) at this location began in WY 2007. In WY 2010 this flume was relocated to the north by <br />about 15 feet to minimize the effects of flooding caused by beaver activity. <br />4.1.3.3 Deep Creek Ditch Flume <br />Deep Creek Ditch is a trans -basin diversion ditch that routes water from the Little Gunnison <br />Creek to Dry Fork, in order to provide irrigation water for users in the Minnesota Creek Basin, <br />and for storage in Minnesota Reservoir. The average annual diversions for Deep Creek Ditch are <br />about 900 ac -ft (CDWR, 2015). A concrete flume (sharp -crested weir) and continuous recording <br />data logger were installed by HydroGeo in this ditch in the fall of 2006 (Plate 1). Baseline <br />monthly monitoring of the Deep Creek Ditch flume was conducted in WY 2006. Routine <br />monitoring (three times per year) at this site began in WY 2007. Data from this station provide <br />information on trans -basin diversions versus natural flows in Dry Fork and Deep Creek. This <br />flume is located up -gradient of the SOD mine panels area. <br />4.1.3.4 Poison Gulch <br />Poison Gulch is an ephemeral stream that is tributary to the Dry Fork and only flows in response <br />to storm events and spring runoff. Poison Gulch flows into Dry Fork between the Middle and <br />Upper Dry Fork monitoring stations. Poison Gulch is located in the SOD mine panels area. The <br />Poison Gulch monitoring station (Plate 1) was established as a new monitoring location in the <br />spring of 2005 and does not have a flume or data logger. Baseline monthly monitoring of Poison <br />Gulch was conducted from May through October 2005. Routine monitoring (three times per <br />year) of Poison Gulch began in WY 2006. <br />4.1.3.5 Deer Creek <br />Deer Creek is an ephemeral stream that is tributary to Dry Fork and only flows in response to <br />storm events and spring runoff. Deer Creek flows into Dry Fork, upstream of the Minnesota <br />Reservoir Flume monitoring station and downstream of the Middle Dry Fork monitoring station. <br />Deer Creek is located in the SOD mine panels area. The Deer Creek monitoring station (Plate 1) <br />was established as a new monitoring location in the spring of 2005 and does not have a flume or <br />data logger. Baseline monthly monitoring of Deer Creek was conducted in WY 2005. Routine <br />monitoring (three times per year) of Deer Creek began in WY 2006. <br />4.1.3.6 Horse Gulch and East Gulch, East of Horse Gulch <br />Horse Gulch and East Gulch, East of Horse Gulch (EGEOHG) are ephemeral stream drainages <br />that are tributary to the Dry Fork and flow only in response to storm events and spring runoff. <br />Horse Gulch flows into Minnesota Reservoir. East Gulch, East of Horse Gulch flows from the <br />north into the Dry Fork, upstream of the Minnesota Reservoir Flume monitoring station and <br />downstream of the Middle Dry Fork monitoring station. Horse Gulch is down gradient of the <br />southwest mine panels area. East Gulch, East of Horse Gulch overlies the southwest and SOD <br />mine panels areas. These monitoring stations were established in 1977, do not have flumes or <br />data loggers, and are located north and northeast of Minnesota Reservoir, respectively (Plate 1). <br />4.1.3.7 Minnesota Creek (Upper, Lower) <br />Minnesota Creek is the major stream that drains the southwestern portion of the permit area. <br />There are two stream monitoring stations in Minnesota Creek: Upper Minnesota Creek, located <br />Revised 09/07- PR12; 08/16- TR139 HydroGeo, Inc <br />