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-1U- <br />will be more pronounced. As more spoils are created, a larder volume of Ground <br />water will be affected and consecuentlu a larder volume cf water will be needed <br />in Ennis'Draw to dilute this water. At present, there is no information on <br />how much water is available in Ennis Draw for dilution. However, the first <br />ouestion that needs to be answered is whether in fact there will be any <br />changes in water quality as the result of water passinc throuch the spoils. The <br />monitoring plan to be implemented bu the apclicar.t, as well as the installation <br />of a new spoil well, will answer this question prior to any additional adjacent <br />mining. If it is found that water quality in the spoils changes greatly, the <br />water ouantity information on Ennis Draw ray he, needed. If the water quality <br />does not change, as the applicant predicts, then water cuality in Ends Draw <br />w'i11 not be impacted. <br />Cumulative Hydrologic Effects - Findings: , <br />An assessment of the probable hydrologic consecuences of the proposed mininc <br />operation and an assessment of the probable cumulative impact of all anticipated <br />mining in the area on the hudrologic balance have be-en made. With the above <br />hydrologic stipulations the proposed operation has been found to be desioned to <br />prevent material damage to the hydrologic balance outside the permit area. <br />X. Climatological Information and Air Resources (2.04.6, 2.05.4(2)(h), 2.05.6(1), <br />4.17) <br />The proposed operation has received initial approval from the Colorado Departnpnt <br />of Health-Air Pollution Control Division for emissions permit 1J0. C-12, 438 (FD) <br />relative to the proposed coal mininc activities. Coors Energy Companu has also ' <br />applied for an amendment to the above per:~st due to an increase in anticipated <br />production. Copies of the emission permit and amendment application can be <br />found in Volume 2, Appendix B. The climatologu sectior, has been reviewed by' <br />the Division. IL can be found in Volume 1,-pages 62-6f. The proposed operation <br />is in compliance. <br />XI. Topsoil (2.04.9, 2.05(3)(s),~2.05.4(2)(d), 4.06) <br />Soil resource information and the topsoil maracement plan have been reviewed by <br />the Division. Baseline soil resource information can be found in Appendix H of <br />Volume II of the Keenesburg mine permit application. Information pertaining <br />to the topsoil management plan can be found cr. pages 95-109 in Volume I of <br />the Keenesburg mine permit application. With the acceptance by Coors Energy <br />Company of the following stipulations, the proposed operation is in compliance. <br />Analysis of overburden in the proposed permit area reveals a potential toxity <br />problem to vegetation due to high Sodium absorption ratio. Coors Energy <br />Company is proposing to replace 3' of topsoil material over re-graded <br />overburden. The 3' depth of replacement was recommended to Coors Energy <br />by its consultant, Dr. D.N. Hyder. Data is not presently available to the <br />Division to determine the optimum depth of topsoil to place over re-graded <br />overburden. In light of this, the following stipulation is necessary: <br />THREE TEST PLOTS WILL BE ESTABLISHED BY COORS ENERGY COMPANY DURING <br />RECLAMATION OPERATIONS IN THE SPRING OF 1982. THESE PLOTS WILL CONSIST <br />OF ONE SCRAPER LORD EACH OF TOPSOIL DISTRIBUTED TO A DEPTH OF 2',3',4' <br />RESPECTIVELY. PLOTS WILL BE MONITORED FOR PRODUCTIVITY ANNUALLY FOR <br />A PERIOD NOT TO EXCEED 5 YEARS. <br />