The U.S. Environmental Protection Agency on Thursday vetoed a water pollution permit issued by the Army Corps of Engineers for one of Arch Coalâ¿¿s proposed mines in West Virginia. This is the first time in 38 years the EPA has vetoed such a project, prompting praise from environmentalists. The action shows the Obama administrationâ¿¿s stance on mountaintop removal mines. EPA Administrator Lisa Jackson said she stopped a mountaintop mine that would have destroyed more than seven miles of vital streams and more than 2,000 mountain acres in an important part of Appalachia. â¿¿The proposed Spruce No. 1 Mine would use destructive and unsustainable mining practices that jeopardize the health of Appalachian communities and clean water on which they depend,â¿ EPA Assistant Administrator for Water Peter Silva said in a statement. St. Louis-based Arch Coal said the EPAâ¿¿s decision blocks an additional $250 million investment and 250 well-paying jobs. â¿¿We remain shocked and dismayed at EPAâ¿¿s continued onslaught with respect to this validly issued permit,â¿ Arch Coal said in a statement. â¿¿Arch will continue to vigorously defend the permit, now in court, along with the right to have a predictable regulatory environment. â¿¿We believe this decision will have a chilling effect on future U.S. investment because every business possessing or requiring a permit under Section 404 of the Clean Water Act will fear similar overreaching by the EPA. Itâ¿¿s a risk many businesses cannot afford to take.â¿ The EPAâ¿¿s decision Thursday is the culmination of a fight to stop a mine that started in 1998 when a resident of Pigeonroost Hollow, one of the hollows that would be destroyed by the mine, sued the U.S. Army Corps of Engineers to revoke Arch Coal's Clean Water Act permit, the EPA said. That lawsuit, the first ever brought by citizens to stop a mountaintop removal mine, sparked years of litigation against the corps to stop the Spruce Mine. Federal regulators said the corps persists in trying to permit these mines which destroy the very streams that the corps is supposed to protect.