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2. 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. Dischazge of Water into an Underground Mine <br />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 fording 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 azea at the lower Hubbard Creek site and the topsoil stockpile at the <br />upper Hubbazd 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 <br />within and through Elk Creek, an intermittent stream. The Division made the <br />findings that: 1) the stream channel will be reconstructed in accordance with <br />the requirements of Rule 4.05.4(4), 2) during and after mining, the water <br />quantity and quality from the stream section within 100 feet of the surface coal <br />mining operations shall not be adversely affected, and 3) the reclamation plan <br />provides 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, Sanborn Creek, and Elk Creek Mine locations. The review <br />includes the probable consequences which will result from the entire Somerset Mine <br />and Sanbom Creek Mine. The Cumulative Hydrologic Impact Study (CHIS) for the <br />North Fork of the Gunnison River contains a detailed analysis of the cumulative <br />impacts of all currently permitted mine activities within the North Fork of the <br />Gunnison River drainage basin. The CHIS document is available for review at the <br />Division office. This PHC is based upon information contained within Permit No. <br />C-81-022 (Somerset Mine and Sanborn Creek Mine) and upon the analyses <br />20 <br />