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Stream Channel Diversions - <br />A clean water diversion above the main facilities azea of the Bowie No. 1 East Mine <br />directs undisturbed area flow around the facilities azea to minimize surface water flow <br />through that site. A similar clean water diversion ditch existed above the facilities at the <br />West Mine portal bench area. However, due to reclamation operations at that site, the <br />clean water diversion ditch was reclaimed. A system of lined and unlined ditches convey <br />waters from the disturbed areas to the sediment ponds. Design details can be found in <br />the approved permit application, Volumes 6, 8, and 8A. <br />In order to minimize water quality impact to water flowing through the Bowie No. 1 <br />West Mine area, water from East Roatcap Creek is diverted to West Roatcap Creek. To <br />verify that no water is lost through diversion of the Overland Ditch, surface water <br />monitoring point SW-09 was moved to, and is currently monitored at, the point of the <br />diversion from East Roatcap Creek. <br />Sedimentation Ponds - <br />The Bowie No. 1 mine plan is designed to minimize the impacts of the project on the <br />surface water hydrology of the region. Disturbed area drainage from the East Mine <br />benches, parking area, west portal fill, and loadout site is collected and treated on the <br />site. Four sediment ponds collect disturbed-area drainage from the mine benches. <br />Another pond controls sediment generated by the West Ridge waste pile. One pond <br />controls drainage from the timber storage area (i.e., training trailer azea; run of mine coal <br />stockpile azea), and two ponds collect drainage from the disturbed azeas of the loadout, <br />truck scales, and highway coal stockpile area. The West Mine portal bench area drained <br />to one sedimentation pond except for exempted portions of the fill face and the <br />ventilation fan facilities, which had small area exemption waivers. With the reclamation <br />work at the West Mine portal bench area, the backfilled and graded azea now drains to <br />two sedimentation ponds. Small area exemptions have also been approved with <br />appropriate demonstrations, for the original mine ventilation bench, the training trailer <br />fill outslopes, and the loadout/railroad fill outslopes. Details can be found in the <br />approved permit application, Volumes 8 and 8A. <br />Alternative design criteria and specifications have been approved for use in sediment <br />pond design and/or construction. This decision is based on a thorough analytical <br />demonstration by a qualified professional engineer that the resulting sediment pond will <br />be environmentally sound and structurally stable, taking into consideration physical, <br />climatological, and other chazacteristics of the site (4.05.6(11)). <br />Acid-Forming and Toxic-Formine Snoil - <br />No acid-forming ortoxic-forming materials have been identified at the Bowie No. <br />Mine. <br />30 <br />