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additional 3.5 acres was added to the permit for a total of <br />2,826.4 acres. Technical Revision 25, approved 10 October, <br />1,996, removed 84.8 acres from the permit area. The current <br />permit encompasses 2,735,6 acres. The wells used to <br />accumulate bast>_line data serve to monitor both water quality <br />and quantity effects before the effects extend to the wells to <br />the north of the permitted area, in the direction of <br />subsurface flow. If in the future, data suggest that drawdown <br />to the Corley wells is occurring, the operator may be required <br />to install additional monitoring wells closer to the wells of <br />interest and meet the requirements of Rule 4.05.15 pertaining <br />to water rights and replacement. <br />The Corley Company Well is located approximately 800 feet from <br />the permit boundary, which coincides with the affected area <br />boundary, and its completion zone in the Raton Formation is at <br />least 400 feet stratigraphically above the coal seams that <br />were mined. Drawdown effects to the Corley Company Well would <br />not be expected to be present. Annual Hydrology reports <br />submitted since 1986 indicate no drawdown effect is occurring. <br />The Corley Mine Well is located approximately 1,400 feet from <br />the permitted area boundary. This well produces approximately <br />60 gpm from the abandoned workings of the Corley Mine. EFCI <br />has the rights to this water and uses the water in mining and <br />processing operations by pumping it to a storage pond (Pond 3) <br />and recycling it through Pond 2. To date, no significant <br />drawdown effects have resulted from this use and none are <br />anticipated. <br />A well permit was issued for the Thompson Well in 1941. The <br />total depth of the well is 338, into the Rex Carbon coal seam, <br />although the source of water is a thin unit above sandstone at <br />a depth of about 320 feet. Subsequently, the Rex Carbon <br />Underground Ntine was developed beneath this area and <br />eventually encountered the well casing. A pipe was connected <br />to the well within the mine workings and water was routed to <br />the surface as a water supply for the Thompson Ranch. At <br />present, the pipe within the mine has been damaged. The <br />casing at the surface has been obstructed; consequently, both <br />mine and Division personnel have been unable to detect any <br />water level within the casing. Available information on the <br />well indicates it is, at present, abandoned. Extensive <br />drilling adjacent to this area by the operator did not reveal <br />any laterally continuous aquifer that could serve as a <br />regional water source. <br />Southfield Mine Permit Renewal 03 <br />40 <br />