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E. Impoundments <br />• Impoundments aze not proposed at this time. <br />F. Ground and Surface Water Monitoring <br />The applicant-will conduct monitoring of ground water in a manner approved by <br />the Division. The ground water monitoring plan is as follows: (4.05.(3(1)}. <br />Ground water is monitored in two alluvial wells in Hay Gulch downgradientfrom <br />the King Coal Mine and downgradient from the King II Mine. Section 2.04.7 and <br />2.05.6 of the permit application require both alluvial wells to be monitored for the <br />following parameters on a quarterly basis: <br />Table 1 <br />Depth-To-Water (ft.) Magnesium <br />pH Sulfate <br />Temperature (°C) Iron <br />Conductivity Sodium <br />Total Dissolved Solids Bicazbonate <br />Calcium <br />• Historical observations indicate the producing coal seam and its overburden have <br />been essentially dry at the King Coal Mine. In 1986, however, mining <br />encountered ground water resulting in this water being pumped to the surface and <br />dischazged to the west sediment pond. It is hypothesized mining dewatered an <br />overlying perched aquifer. It is possible, however, that some inflow from the Pine <br />Gulch drainage may have occurred. <br />2. The applicant will monitor surface water in a manner approved by the Division. <br />The monitoring plan was submitted under 2.05.6(3)(b)(iv) and includes the <br />following: (4.05.13(2)). <br />Surface water monitoring is limited to NPDES dischazges, as no surface streams <br />with regulaz flows occur in the permit area. Required monitoring of the irrigation <br />water from the La Plata River ended in the fall of 1998. <br />• <br />16 <br />