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Well 008 -AU -3 and surface water site 305 monitor water levels upstream from the Fish Creek Tipple area with <br />data presented on Figure 44. The furthest downgradient Fish Creek alluvial monitoring well is 008 -AW -3 (Figure <br />46) located near the Fish Creek Tipple. No unusual water level fluctuations were noted at any of these sites <br />during 2018. Similarly, conductivity values for these two sites were within historical ranges. <br />Trout Creek Alluvial Groundwater: There are two Trout Creek alluvial monitoring wells, 008 -AT -1, and a <br />privately owned well (Jones well). Note that 008 -AT -1 was destroyed sometime in 2013. The well was replaced <br />in 2014. Figures 48 through 51 provide graphical representations of water level and field conductivity <br />information to date. Note that water levels are about 3 feet higher than historical, which may relate to the new <br />well location and proximity to Trout Creek.. Tables 27 and 28 provide data for these wells. <br />Well 008 -AT -1 is monitored in conjunction with surface water site 1005. Figure 48 depicts several water years <br />for 008 -AT -1 for comparison. Monitoring was initiated on Trout Creek Alluvial wells back in 1994. Figure 49 <br />shows TDS values for 008 -AT -1. TDS concentrations had been rising slowly since 2006, but dropped around <br />the time the well was destroyed, and recovered sometime after the well was replaced. <br />Note that the Jones well has historically been monitored to access potential mine impacts to the Jone's potable <br />water well. In the fall of 2008, TC provided the Jones family with underground water storage tanks, a new <br />plumbing system, and imported water, so that they could discontinue use of the well. At that time, the old <br />plumbing system to the Jones well was decommissioned eliminating alluvial water sampling access. In 2018 TC <br />supplied Jones with a deep fresh water well and a filtration system in place of long term haulage of potable water. <br />TC will evaluate this monitoring point in 2019 and discuss further with CDRMS. <br />Middle Creek Alluvial Groundwater: TC has no active Middle creek alluvial wells. Two Middle Creek <br />alluvial wells (AVM -1 and AVM -2) were incorporated into the monitoring network during 1996, however, per <br />TR0342, these wells were abandoned in the Fall of 2003. Refer to previous AHRs for earlier data. <br />3.21 Points of Compliance <br />Rule 4.05.13(1)(b) requires formal establishment of ground water points of compliance for coal operation which <br />has the potential for negatively impacting the quality of ground water for which quality standards have been <br />established by the Colorado Water Quality Control Commission. The Commission's Rule 41 sets forth Basic <br />Standards for ground Water. These Standards are applicable to ground water at the Foidel Creek Mine. In the <br />judgment of DRMS, these Standards are applicable to ground water at the Foidel Creek Mine, however it is also <br />the judgment of DRMS, the Foidel Creek Mine does not have the potential to negatively impact bedrock aquifers <br />due to the nature of the geology (i.e. synclinal basin) found at the mine's location. <br />Wells 008 -AV -2 (Foidel Creek alluvium), 008 -AU -3 (Fish Creek alluvium), and well 008 -AT -1 (Trout Creek <br />alluvium) will satisfy the requirements for alluvial ground water points of compliance. 0 <br />10 <br />