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Stream Buffer Zones <br />Introduction <br />According to Rule 4.05.18, no land within 100 feet, or greater if required by the Division, of a perennial <br />stream, an intermittent stream, or an ephemeral stream with a drainage area greater than one square <br />mile, shall be disturbed by surface and underground coal mining operations unless the Division <br />specifically authorizes surface or underground mining operations closer to, or through such a stream. <br />Additionally, the area not to be disturbed shall be designated a stream buffer zone and marked as <br />specified in Rule 4.02 within the permit boundary. <br />From a historical perspective, various disturbances have occurred within 100 feet of perennial streams, <br />intermittent streams, or ephemeral streams with a drainage area greater than one square mile. The <br />locations of the disturbances that are described below are depicted on Map 4.05.18-1. <br />Calamity Draw <br />Pump Station <br />The Calamity Draw pump station is a temporary installation consisting of a sump, water pump, and <br />water lines. During installation and to date, this station has not created any adverse impacts to Calamity <br />Draw. The pump station is used to withdraw irrigation water from Calamity Draw. WFC has provided a <br />demonstration (see attached SEDCAD) to show that sedimentation ponds or other facilities are not <br />necessary for the drainage to meet the effluent limitations of 4.05.2. In accordance with Rule <br />4.05.2(3)(a), this demonstration meets the criteria for an exemption from the requirements of 4.05.2. <br />Ditch C-18 <br />Portions of Ditch C-18 were constructed inside the stream buffer zone for Calamity Draw. During <br />construction and to date, this has not created any adverse impacts to Calamity Draw. As constructed, <br />Ditch C-18 functions as a collection ditch which captures surface water runoff from the disturbed and <br />reclaimed areas and conveys surface runoff to an approved sediment control structure (Pond 007). <br />Pond 007 <br />A portion of the Pond 007 outfall was constructed inside the stream buffer zone for Calamity Draw. <br />During construction and to date, this has not created any adverse impacts to Calamity Draw. In <br />accordance with Rule 4.05.18, the pond location within the buffer zone has not caused or contributed to <br />a violation of applicable water quality standards. As built, the pond is capturing all surface water runoff <br />from mining operations and discharging them through an approved outfall location which is in <br />compliance with New Horizon's mine current water quality discharge permit. Finally, Pond 007 does not <br />create a temporary or permanent stream channel diversion. <br />Section 4.05.18 Page 1 March 2015 (TR -68) <br />