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down gradient, no significant impacts to groundwater quantity or quality wereidentified <br />or substantiated during the operational life of the Carbon Junction Mine. <br />Probable Hydrologic Consequences <br />During the re-permitting of the mine in 1993, it was concluded that impacts to the <br />hydrologic balance would be minimal due to the mitigative measures the company <br />planned. The only significant change to the existing conditions at the mine since that <br />finding has been the mining of sand and gravel under a permit issued by the Division <br />under the Colorado Mined Land Reclamation Act (CRS 34-32-101et seq). The <br />subsequent mining of sand and gravel at the site has increased the acreage of surface <br />disturbance by approximately 33 acres. This acreage is less than the total amount <br />proposed to be disturbed by the Carbon Junction operation at buildout. The sand and <br />gravel operations wereconducted within the proposed disturbed area of the coal mine and <br />minimize impacts to the surface water regime through the use of the same sediment <br />control technology as the coal mine. Groundwater impacts from the sand and gravel <br />operation werenot anticipated as the operation is mining dry alluvial terrace gravels. <br />Therefore, the predictions of the PHC remain valid. <br />There are no users of surface waters or persons who have water rights in, or adjacent to, <br />the permit area other than the present landowner. The potential impact to the nearest <br />ground water wells has already been addressed in Section 2.04. <br />The quantity of water, both surface and underground, wereprotected from adverse effects <br />of the mining operation. All surface water originating in and above the drainage area <br />flowsto the Animas River as it always has. <br />Water Monitoring <br />After discussions with CDRMS, it was determined that spring/seep and groundwater <br />monitoring at the Carbon Junction Mine wasno longer necessary. Themonitoring <br />program wasterminated as of the first calendar quarter of 2006. <br />Oakridge conducteda spoils monitoring program as a part of the protection of the <br />hydrologic balance in the reclamation program. The spoils monitoring beganwith spring <br />runoff in 1998, and determined thatnosignificant discharge occurredwhere afterthe <br />monitoring was terminated with the approval of CDRMS.A single monitoring point was <br />established at the base of the spoil at the lower end of the underdrain. <br />2.05.6(4) Protection of Public Parks and Historic Places <br />There are no public parks or historic places near the mine site. <br />Abridged Permit Document 5-22 Permit Renewal RN04 4/2014 <br />