Laserfiche WebLink
<br />• <br />• <br />2.0 HYdrologit Data lurrprrtation aM lmpaa Assrnmru for rhr Permit and Adja[ru Arras <br />sealed due to unsafe mining conditions. As <br />a result, no additional monitoring activities <br />are proposed. <br />MCC is expanding lease holdings adjacent to <br />the permit area and acquiring baseline water <br />monitoring data. This effort will continue <br />into the 1995 WY. Modification of the <br />facilities during 1995 will increase the tvn- <br />off from newly disrurbed azeas. <br />Adequacy <br />The monitoring program as established and <br />implemented appears to provide the infor- <br />mation required to assess impacts of the <br />mining activities to the hydrology in the <br />vicinity of the West Elk Mine. <br />Water Analysis Reports (ACZ Laboratories) <br />aze on file at the West Elk Mine. <br />F Seam <br />MCC plans no further mining activities in <br />the F seam in WY 1995. <br />B Seam <br />During 1995, longwall panel and mains <br />development and longwall retreat mining <br />will continue. Development of the 7th and <br />8th Northwest longwall panels will be <br />completed. Longwall mining of the 5th, 6th <br />and 7th Northwest Longwall panel are <br />planned. Development of some of the 9th <br />will also be completed. The North Jumbo <br />Mains development will continue northward <br />to the Lone Pine Gulch ventilation facility. <br />Water Quality <br />Samples taken during 1994 indicate water <br />quality in the mine to be good. Only the <br />amount of water necessary for mining will <br />be imported into the mine. Accordingly, <br />1995 should pose no problem for discharge. <br />The dischazges should readily meet NPDES <br />effluent limitations after settling and should <br />not measurably impact receiving waters. <br />Quality of water discharged in WY 1995 <br />should be similar to the WY 1994 values. <br />R1.2I0/IOA/OS/OS/95(8:04am) <br />2.7 CHANGES PROPOSED <br />FOR WY 1995 <br />MCC is modifying the hydrologic <br />monitoring plan for 1995. Changes were <br />incorporated into the permit through <br />Technical Revision 71. Annual full-suite <br />monitoring of major cations and anions will <br />occur a[ all sites with seasonal sampling of <br />field pazameters. Testing for total <br />suspended solids (TSS), rurbidiry and <br />dissolved oxygen will be discontinued for <br />samples taken from wells; and dissolved <br />oxygen will no longer be acquired from <br />samples taken from surface water sites and <br />springs. Seasonal monitoring of TDS, TSS, <br />iron and manganese will occur at sites <br />located in the facilities area. An additional <br />Sylvester Gulch surface water site will be <br />added ENE of the Lower Refuse Pile. Two <br />new wells were installed in late 1994, LP-1 <br />and GB-1. LP-1 is completed in the Rollins <br />sandstone and is located neaz the Lone Pine <br />Gulch ventilation facilities. GB-1 is <br />completed in the Sylvester Gulch alluvium <br />and is located near and is a replacement for <br />SG-1. <br />26 RE~iSED 10/02/96 <br />