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SENECA II <br />PERMANENT STOCK POND EVALUATION <br />Seneca Coal Company (SCC) has constructed 24 temporary stock tanks in the reclaim area at the Seneca <br />II mine. SCC has reviewed the need and design for each of these structures to determine whether they <br />should be retained as permanent or be reclaimed. The results of this review indicated that a number of the <br />structures could be reclaimed. <br />STOCK PONDS TO BE RETAINED STOCK PONDS TO BE <br />AS PERMANENT STRUCTURES RECLAIMED <br />T-3, T-4, T-8, T-16, T-17, T-20, T-26, T-28, T-29 T-1, T-2, T-5, T-6, T-7, T-9, T-10, T-11 <br />T-30, T-31, T-32, T-33 T-13, T-I5, T-25 <br />The purpose of this evaluation is to demonstrate that existing stock ponds T-3, T-4, T-8, T-16, T-17, T- <br />20, T-26, T-28, T-29, T-30, T-31, T-32 and T-33 meet the design criteria specified in the Regulations of <br />the Colorado Mined Land Reclamation Board for Coal Mining (Rule 4.5.09) for permanent <br />impoundments. <br />WATER QUALITY <br />Water contained in the proposed stock ponds will originate as runoff from the Seneca II reclamation <br />areas. There has been no indication that neither the spoils nor replaced topsoil contain potentially acid or <br />toxic forming material that could adversely impact surface water quality. In addition, water sampling in <br />the area has not indicated any water quality problems. Therefore, SCC does not anticipate any problems <br />with water quality. Water sampling conducted during the bond release period will be used to confirm this <br />assumption. <br />WATER PERSISTANCE <br />Based on quarterly pond inspections all the ponds that will be left as permanent stock ponds contain water <br />most of the spring and summer seasons. SCC will continue to inspect the stock ponds on a regular basis. <br />If inspections show that any pond remains dry for three (3) years successive years, then the pond will be <br />reclaimed. <br />ACCESSIBILITY <br />All of the stock ponds are easily accessible to livestock and wildlife. <br />STORAGE CAPACITY <br />The storage capacity of all the permanent stock ponds are less than two acre-feet, therefore there should <br />not be any significant effect on down stream users. <br />POSTMINE LAND USE <br />The proposed/approved postmine land use for the Seneca II mine area is primarily for livestock grazing <br />and secondarily as wildlife habitat. The permanent stock ponds will enhance both postmine land uses. <br />TR-46 I Revised 1 U08 <br />