Laserfiche WebLink
Wolf Creek Overburden/Undetburden <br />Wells WWCOV24 (overburden) and WWCU24 (underburden) were drilled in <br />August 2001 in the II-W South area adjacent to the Pond 016A embankment. <br />The wells failed due to a landslide in the spring of 2003 and were <br />subsequently abandoned. Both were flowing wells. Initial OV24 samples <br />displayed a CaMg-HCO, type water with TDS values of 550 and 720 mg/l. <br />U24 initial samples displayed a Na-HCO,SO, type water with TDS values of <br />1180 and 2380 mg/1. Replacement wells were drilled in the summer of 2004. <br />Sage Creek Coal <br />Mining of the Sage Creek seam began in September 2003, in the south <br />extension area. Well WSC24 was drilled in August 2001 in the II-W South <br />area adjacent to the Pond 016A embankment. The well failed due to a <br />landslide in the spring of 2003 and was subsequently abandoned. Only five <br />samples were collected. WSC24 was a flowing well. Initial samples displayed <br />a Na-HCO,SO, type water, with TDS values of 770 and 1190 mg/1. A <br />replacement well was drilled in the summer of 2004. <br />Sage Creek Overburden <br />Well WSOV24 was drilled in August 2001 in the II-W South area adjacent to <br />the Pond 016A embankment. The well failed due to a landslide in the spring <br />of 2003 and was subsequently abandoned. Only five samples were collected. <br />WSOV24 was a flowing well. Initial samples displayed a Ca-Mg-HCO, type <br />water, with TDS values of 660 and 760 mg/1. A replacement well was drilled <br />in the summer of 2004. <br />Wadge Coal <br />The Wadge coal was the principal seam of interest within the original permit <br />area, and is also mined in the south extension area. It is typically 11 to 13 feet <br />thick, except where split by partings. <br />The Wadge coal outcrops along the east side of the permit area. These outcrops <br />and perhaps a portion of the overburden east of the permit area, are thought to be <br />the major source of recharge to the Wadge. Depth to water and water quality are <br />monitored at five sites within and adjacent to the permit area. The varying <br />amounts of head measured at these wells again indicates that the major component <br />of flow is to the west. The amount of head within the Wadge, as in all the units in <br />this area, is a function of distance from the recharge area (anticlinal axis) and the <br />type of over/underburden present. <br />Seneca II-W Findings Document 32 November 17, 2004 <br />Permit Revision No. 4 <br />