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41of the permit document (4.05.13(1)). <br />The applicant will conduct monitoring of surface water in a manner approved <br />by the Division. The monitoring plan was submitted under 2.05.6(3)(b)(iv) and <br />as specified on page 2.05-46iii of the permit document (4.05.13(2)). <br />I. Discharge of Water into an Underground Mine <br />1. Dischazge of water to underground workings will not occur. <br />Stream Buffer Zones <br />The Division has approved surface and underground mining activities within <br />100 feet or through perennial streams. This decision was based on a finding that <br />on Hubbard Creek the original stream channel will be restored, water quality <br />and quantity shall not be adversely affected, and appropriate riparian vegetation <br />will be reestablished. On the North Fork of the Gunnison, the decision was <br />based on the fact that the original stream channel would not be affected and <br />water quality and quantity would not be adversely affected. The buffer zone <br />variance was granted for the azeas located at the stream crossing and pre-law <br />bench area at the lower Hubbazd Creek site and the topsoil stockpile at the <br />upper Hubbard Creek site. The buffer zone variances on the North Fork of the <br />Gunnison aze located at the alluvial well and leach fields just above and below <br />the town of Somerset (4.05.18(1)). <br />2. The Division has approved surface and underground mining operations within <br />and through Elk Creek, an intermittent stream. The Division made the fmdings <br />that: 1) the stream channel will be reconstructed in accordance with the <br />requirements of Rule 4.05.4(4), 2) during and after mining, the water quantity <br />and quality from the stream section within 100 feet of the surface coal mining <br />operations shall not be adversely affected, and 3) the reclamation plan provides <br />for the reestablishment of appropriate riparian vegetation. <br />K. Probable Hydrologic Consequences of Mining (2.05.6(3)(b)(iii)) <br />This section reviews the Probable Hydrologic Consequences (PHC) of mining at the <br />Somerset Mine, Sanbom Creek, and Elk Creek Mine locations. The review <br />includes the probable consequences which will result from the three mines. The <br />Cumulative Hydrologic Impact Study (CHIS) for the North Fork of the Gunnison <br />River contains a detailed analysis of the cumulative impacts of all currently <br />permitted mine activities within the North Fork of the Gunnison River drainage <br />basin. The CHIS document is available for review at the Division office. This PHC <br />is based upon information contained within Permit No. C-81-022 (Somerset Mine, <br />Sanborn Creek Mine, and Elk Creek Mine) and upon the analyses contained within <br />21 <br />