Laserfiche WebLink
Because of the physical distance between the reclaimed mine site and the <br />nearest perennial stream, the quality of water in that stream, the limited use <br />of water from that stream, and the fact that the mine site was reclaimed three <br />years ago and appears stable, no adverse impacts on surface water quantity or <br />quality are predicted to occur due to the reclamation of the Fruita Mine. <br />Ground Water <br />The mine workings at the reclaimed Fruita Mine site were driven into the Cameo <br />and Anchor coal seams, which are found in the Mount Garfield formation within <br />the Mesaverde Group. The Mesaverde Group is underlain by the Mancos shale <br />formation which forms a major portion of the floor of the Grand Valley. <br />During exploration and mine development by Dorchester Coal Co., 22 holes were <br />drilled in the vicinity of the Fruita Mine. No significant ground water was <br />encountered in either the Cameo or Anchor coal seams or their overburden. <br />There is no record of any significant amount of water being encountered by the <br />mine workings when they were developed. Water in the Cameo coal seam is only <br />known to occur in isolated areas. The first significant aquifers below the <br />Cameo and Anchor coal seams are hydrologically isolated from the mine workings <br />by the Mancos shale which underlies the Mesaverde Group. <br />The portals at the Fruita Mines were backfilled and sealed in accordance with <br />MSHA standards in 1989. The area in front of the portals was backfilled, <br />graded and revegetated at that time, as well. No evidence of any mine water <br />has been observed since the site was reclaimed. No new mining will be allowed <br />under the reclamation only permit being proposed at this time. Therefore, <br />impacts on ground water quantity or quality due to the reclaimed Fruita Mine <br />site are not predicted to occur. <br />Conclusion <br />Pursuant to Rule 2.07.6(2>(c> and based on the discussion above, the Division <br />finds that the reclamation operations proposed under the Fruita Mine <br />application have been designed to prevent damage to the hydrologic balance <br />outside the permit area. <br />III. Topsoil <br />Since much of the site was disturbed prior to the enactment of CSCMRA, <br />little topsoil was salvaged. The topsoil that was salvaged has been <br />redistributed to a depth of approximately four inches over the reclaimed <br />area. <br />IV. Sealing of Drilled Holes and Underground Openings <br />Both portals have been sealed and backfilled according to MSHA <br />requirements. <br />2. The Division will require that each hole, well or other underground <br />opening be capped, sealed, backfilled, or otherwise property <br />managed (4.07.3). <br />_lr_ <br />