Laserfiche WebLink
included in an annual hydrological report submitted each year, structured around the <br />normal "water year" (October 1 through September 30). <br />5. During periods of temporary cessation of operations at the Munger Canyon Mine, <br />items 1, 2, and 3 listed above are modified as follows: Water quality samples will be <br />limited to quarterly samples from SW -3. Surface water samples will be analyzed for <br />the 8 parameters listed in the "Short Suite For Temporary Cessation List", in Table <br />2.5-2 of the permit application. <br />Ground Water <br />The ground water monitoring program is addressed in Section 2.6 of the application text, <br />the parameter list is presented in Table 2.5-2, and monitoring site locations are shown on <br />Figure 2.3-5. <br />Adequate baseline data characterizing the hydrogeology of the permit and adjacent areas <br />was provided in the original permit application, summarized in Section 4.4 of the <br />application text. <br />Drilling in the area indicated the presence of a saturated zone within the Cameo seam <br />(Figure 4.4-1 of the PAP). Data indicates that the Carbonera seam, which overlies the <br />Cameo seam, also becomes progressively saturated to the northeast of the five-year <br />permit area. The zone of saturation in the Cameo seam is probably recharged at the <br />point where the Cameo seam subcrops below the East Salt Creek alluvium, <br />approximately three miles upstream of the mine. Very little recharge of water in coal <br />seams and sandstones occurs along the outcrops due to the low annual precipitation rate <br />(8.8 inches) and the steep slopes, which favor runoff over infiltration. <br />The applicant did not establish monitoring wells in strata overlying the underground <br />mine workings prior to mining. This was due to the relative inaccessibility of the <br />characteristically steep terrain within the mine area to truck -mounted drill rigs. <br />Previous exploration drill holes in the area of the McClane Canyon Mine have been dry <br />to a depth in excess of 200 feet below the Cameo seam. The Cameo seam's associated <br />roof and floor strata are not saturated in the area of the mine. The mine is not a recharge <br />area for these strata (see Figure 4.4-1 and Appendix G of the PAP). The Munger Canyon <br />Mine is located updip of the McClane Canyon Mine, which suggests that similar <br />conditions likely prevail in the Munger permit area. <br />No water was encountered in the mine during initial mining operations; the mine portals <br />have been sealed and mine disturbances have been largely reclaimed as of December <br />2007. No further mining is proposed or approved. There has been no discharge of <br />water from the mine, and no future discharge is anticipated. <br />An alluvial ground water aquifer has been identified along East Salt Creek. Monitoring <br />wells established in the alluvium indicate that alluvial water levels fluctuate seasonally in <br />response to flow in East Salt Creek, which in turn fluctuates primarily in response to flow <br />in tributary ephemeral streams. Data collected by the applicant from the Salt Creek <br />18 <br />