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4.20.3(1)). No structures are within the projected area to be <br />affected by the Sanborn Creek Tracts subsidence. However, there <br />are several landslide features above the proposed underground <br />workings and Somerset Mining Company has committed to monitoring <br />these features. <br />2. The applicant has proposed a subsidence monitoring program, in <br />accordance with Rule 2.05.6(6)(c), designed to determine the <br />commencement and magnitude of subsidence movements. The results of <br />the monitoring program will be submitted to the Division annually. <br />The monitoring program is designed to extend fora time, beyond <br />cessation of mining in any area, consistent with the need for <br />verification of the subsidence prediction. <br />XI. Operations on Alluvial Valley Floors <br />1. The Division has determined that an alluvial valley floor exists in <br />an adjacent area. Therefore, the following findings are in order <br />for the alluvial valley floor that is located on the North Fork of <br />the Gunnison River downstream from the mine site. <br />The Division finds that activities proposed by the applicant will <br />not interrupt, discontinue, or preclude farming on the alluvial <br />valley floors that are irrigated or naturally subirrigated <br />(4.24.3(1)). <br />The proposed activities will not materially damage the quantity or <br />quality of water in the surface or ground water system described <br />above (4.24.3(3) and 2.06.8(5)(a)(ii)). <br />Coal mining and reclamation operations will be conducted to <br />preserve the essential hydrologic functions of alluvial valley <br />floors outside the permit area throughout the mining and <br />reclamation process (4.24.2). <br />4910E <br />-21- <br />