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East Pyeatt drainages. Adequate sediment control facilities exist downstream <br />of all fords except the West Pyeatt ford. (4.03.2(2)(c)). <br />II. Support Facilities - Rule 4.04 <br />Support facilities are discussed under Section 3.8, Vol. III of the permit application. <br />A. Construction of support facilities will not result in damage, destruction, or <br />disruption of oil, gas, or water wells or pipelines, coal slurry pipelines, <br />railroads, or utility lines which pass over, under, or through the permit area. <br />Utility lines and a gas line pass through the permit area but are affected only <br />by the pit areas and not by any support facilities. Written approval from the <br />owner of the affected facilities has been submitted. The Division has <br />previously approved the activities (4.04(6)). <br />III. Hydrologic Balance - Rule 4.05 <br />Volume 4 of the Trapper Mine permit application includes an assessment of the <br />probable hydrologic consequences of the proposed mining operation. Each year <br />Trapper assesses the ongoing impacts to the hydrologic system in its annual hydrologic <br />report submitted as Appendix W of the permit application. The probable hydrologic <br />consequences as set forth in Volume 4 and Appendix W are summarized below. <br />A. Water Quality Standards and Effluent Limitations <br />Surface discharge at the Trapper Mine is monitored under NPDES permit # CO- <br />0032115 issued by the Colorado Department of Public Health and Environment. <br />In addition, the applicant has semi-annual requirements imposed by the Division <br />as part of its surface water monitoring program. Acute toxicity testing through <br />bio-monitoring sampling is required in No Name, East Buzzard, Coyote, West <br />Buzzard, Middle Pyeatt, and East Pyeatt drainages due to pit dewatering. No <br />specific approvals are required by the Division under this section. <br />B. Stream Channel Diversions <br />Drainageway reconstruction is discussed under Section 4.8.1.3, Vol. IV of the <br />permit application. <br />1. Channel lining structures, retention basins, and artificial channel roughness <br />structures are proposed for use to control erosion. These means are proposed <br />to be approved by the Division being that they are necessary to control <br />erosion; they are stable and will require infrequent maintenance. The <br />applicant uses rock check structures, various geotextiles, and rapid growing <br />vegetation within reconstructed drainages to control erosion. (4.05.4(2)(a)). <br />Trapper Mine 21 July 25, 2008