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• Stormwa~o Managernnu Plm~ <br />Best Management Practices, as defined by the U.S. Environmental Protection Agency, are <br />those schedules of activities, prohibition of practices, maintenance procedures and other <br />management practices including treatment requirements operating procedures and other <br />practices to control site runoff, spillage or leaks, sludge or waste disposal, or drainage from <br />raw material storage areas. <br />The following discussion gives the specific application of these practices at the Reclaimed <br />Colorado Coal Mine No. 1 by Kaiser Steel Resources and establishes these management <br />practices to control pollutants in stormwater discharges. The Colorado Coal Mine No. 1 site <br />was completely reclaimed in 1989, including removal of all buildings (all pre-fab or mobile), <br />temporary roads, and related facilities. Sediment control structures were also removed in <br />1992. The removal of these facilities and the ceasing of operation represents a highly <br />significant and effective form of stormwater management. <br />Practices to control site runoff at the Reclaimed Colorado Coal Mine No. 1 have been <br />extensive and reflect the extent to which Kaiser Steel Resources has worked diligently to <br />schedule activities to prohibit practices and to maintain procedures which restrict or prevent <br />pollutants in public waters. For example, two sedimentation ponds (A and B) were <br />constructed to collect mine site drainage. In 1992, sedimentation ponds A and B were <br />reclaimed following a demonstration that the reclaimed disturbed area runoff contained less <br />• sediment than pre-mine runoff. <br />• <br />Kaiser Steel Resources has also instituted an annual rill and gully inspection program for the <br />reclaimed mine site. It is conducted in June to determine if erosion techniques are <br />successful. If gullies or rills of sufficient depth are identified, these are repaired by Kaiser <br />Steel Resources. <br />No sludge or waste disposal occurs at the Reclaimed Colorado Coal Mine No. 1 as a best <br />management practice. In addition, raw materials are not stored at the site, avoiding <br />drainage from raw material storage areas and no hazardous materials are stored there. <br />To further control pollutants at the Reclaimed Colorado Coal Mine No. 1, other <br />management practices will be utilized. While the U.S. Environmental Protection Agency <br />specifies eleven items as significant aspects of stormwater pollution control and management, <br />not all eleven of these practices apply to the Reclaimed Colorado Coal Mine No. 1. Those <br />that are implemented are described below. <br />• Preventive Maintenance. At the Reclaimed Colorado Coal Mine No. 1, preventive <br />maintenance will be practiced at the site through the rill and gully inspection program. <br />6 <br />