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these pond designs as part of PR8 and has found the pond designs adequate according <br /> to Rule 4.05. <br /> D. Surface and Ground Water Monitoring <br /> 1. The applicant will conduct monitoring of ground water in a manner approved by <br /> the Division. The ground water monitoring plan can be found in Section 4. 8. <br /> 5.2a,Vol. IV of the permit application (4.05.13(1)). <br /> 2. The applicant will conduct monitoring of surface water in a manner approved by <br /> the Division. The monitoring plan was submitted under 2.05. 6(3)(b)(iv)and can <br /> be found in Section 4. 8.5. la of the permit application,Vol. IV(4.05.13(2)). <br /> The Division reviewed the surface and ground water monitoring plans as part of the <br /> permit revision PR10 review process. These monitoring plans are adequate to monitor <br /> for the development of impacts, if any should develop. Well GP-09 has been <br /> designated the groundwater point of compliance for the Third White Sandstone <br /> aquifer, and the Coy well is the point of compliance for the Flume Gulch alluvium. <br /> New water monitoring will be undertaken down dip of the I and J pits near the Coyote <br /> Pond as the pits develop to the west. These wells have been drilled under the NM25 <br /> permitting action and will monitor the First, Second and Third White Sandstone <br /> aquifers. <br /> E. Probable Hydrologic Consequences <br /> The model for leachate formation and migration at the Trapper Mine is based on a <br /> study conducted by the U.S. Geological Survey at the Seneca II Mine in Routt County, <br /> approximately 14 miles east of the Trapper Mine (U.S. Geological Survey Water <br /> Resources Investigations Report 92-4187). The model is described in the probable <br /> hydrologic consequences of the permit application (Section 4.8). <br /> Permit section 4.8.2.2 discusses potential drawdown impacts to adjacent wells. A <br /> groundwater monitoring program is discussed in section 4.8.3.2 of the permit. Point <br /> of compliance wells are in place. No drawdowns have been detected in aquifer <br /> wells within one mile from the permit boundary. Observed drawdowns have been <br /> temporary and are limited to the immediate vicinity of the pits. The operator <br /> expects such limited drawdowns to continue with future mining. <br /> The proposed mining operation will have little if any effects on the post-mining <br /> recharge capacity. The applicant's studies concluded that the recharge capacity of <br /> the reclaimed spoils will actually be slightly higher than the pre-mine condition. <br /> The mine activities should not impact any regional aquifers except the Third White <br /> Sandstone. Mined strata dip far beneath the Yampa River alluvial aquifer and <br /> communication between these strata and the alluvial aquifer is negligible. <br /> 16 <br />