Laserfiche WebLink
King Coal Mine (C-1981-035) MT-9 <br /> runoff from disturbed areas is passed through sediment control ponds which discharge into Hay <br /> Gulch. <br /> An ephemeral stream channel likely existed in the bench area of the King I Mine prior to initial <br /> disturbance of the site. Runoff from larger events would occur as channel flow, while smaller events <br /> would primarily recharge the alluvium from side-slope areas. With reclamation of the site, a channel <br /> will be reconstructed through the facilities area. A review of the channel design indicates it meets <br /> the requirements of Rule 4.05.3. Channels disturbed at the King 11 Mine will also be regraded to <br /> approximate original contour to meet the requirements of Rule 4.05.3. <br /> The King I workings extended southward beneath the Pine Gulch ephemeral drainage and other small <br /> drainages. Pine Gulch flows into Hay Gulch approximately two miles downstream from the permit <br /> area. Northwest of the King 11 Mine (above the workings of the OSMRE permit) lies East Alkali Gulch, <br /> an ephemeral stream. East Alkali flows to the southwest and south, ultimately joining Hay Gulch <br /> approximately seven miles downstream of the permit area. <br /> The Huntington Irrigation Ditch, the Huntington Irrigation Pipeline, and the Huntington Pond overlay <br /> worked-out areas of the King I Mine. All three features are owned by Huntington Ranches and are <br /> located on Huntington Ranch property. <br /> The Division has approved surface operations within 100 feet of Hay Gulch (entrance roads) and <br /> within ephemeral streams (tributaries to Hay Gulch) that have drainage areas greater than one <br /> square mile. The Division has determined that water quality standards will not be violated and <br /> environmental resources shall not be adversely affected due to these operations within stream buffer <br /> zones. <br /> Additional information on surface water hydrology can be found in the PAP, namely in Sections <br /> 2.04.7, 2.05.3 and 2.05.6; Maps King 1-007, King 1-007a; and the King 11 —007 series of maps. <br /> The assessment of the cumulative hydrologic impacts of all anticipated coal mining in the general <br /> area of the King Coal Mine, as described in Section 2.05.6(3) of the PAP, has been made by the <br /> Division. This assessment, entitled "Cumulative Hydrologic Impact Assessment for Hay Gulch," is <br /> available for inspection at the offices of the Division. The Division finds that the operations proposed <br /> under the application have been designed to prevent damage to the hydrologic balance outside the <br /> proposed permit area. <br /> Climate <br /> The climate is semi-arid, characterized by hot summers, cold winters, and a limited amount of <br /> precipitation each year. The prevailing winds are from the southwest and west with an average <br /> annual precipitation rate varying from 15 to 19 inches. The growing season in the area varies <br /> depending on elevation and exposure with a maximum of 96 frost-free days. <br /> Page 7 of 11 <br />