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• ~ CO-0012 <br />Page 8 of 13 <br />-4- <br />ti on of the surface facilities area of the Orchard Valley Mine. This project <br />shall proceed in a timely fashion to completion by December 31, 1982. The <br />Regulatory Authority shall be kept informed by monthly letter of the progress <br />of this task by the operator. Upon completion of Phase III, the reclamation <br />plan section of the Orchard Valley mine plan shall be appropriately amended. <br />19. Colorado Westmoreland, Inc. is directed to complete Phase II of the <br />geotechnical and stability analyses of its surface facilities area at the <br />Orchard Valey Mine, as outlined in the various letters of proposal from <br />Merrick 6 Company and Geohydro Consultants included in Volume 10 of the <br />amended application. Phase II of this study includes an analysis of alternate <br />proposed sites for a coal processing waste Di le at the Orchard Va~ley Mine. <br />The scope of Phase II shall include test drilling and excavation of test pits, <br />the installation of appropriate water quantity and quality monitoring wells, <br />the performance of various rock and soil test, and the performance of a series <br />of stability analyses dealing with existing surface facility configurations <br />and with the proposed alternative sites and structures for a coal processing <br />waste pile. This analysis shall be completed and a report summarizing the <br />results and methodology thereof submitted to the Regulatory Authority for <br />review by December 31, 1981. <br />20. Colorado Westmoreland, Inc. is directed to complete Phase III of the sta- <br />bility analysis and redesign of the final reclaimed configuration of the sur- <br />face facilities of the Orchard Valley Mine, as described in the various let- <br />ters of proposal from Merrick 6 Company and Geohydro Consultants included in <br />Volume 10 of the amended application. The scope of Phase III shall include <br />the utilization of the findings and recommendations of Phase II to complete <br />final design of the proposed coal processing waste pile at the Orchard Valley <br />Mine. This project shall proceed in a timely fashion to completion by June <br />30, 1982. The Regulatory Authority shall be kept informed by monthly letter <br />of the progress of this task by the operator. Upon finalization of the coal <br />processing waste pile design, the Orchard Valley mine plan shall be appropri- <br />ately amended. <br />21. Colorado Westmoreland, Inc. is directed to finalize the design of the <br />proposed coal processing waste structure at the Orchard Valley Mine. This <br />design is to be completed by June 30, 1982. Prior to appropriate amendment of <br />the mine plan, the operator may continue placement of coal processing waste at <br />the existing waste pile location. However, waste placement must conform with <br />the requirements of Rule 4.10.4(3), and the total amount of coal processing <br />waste placed in the existing site shall not exceed 25,000 yards,3 including <br />waste now deposited at that site. In the event that the total quantity of <br />waste disposed of at the existing site exceeds 20,000 yard s3, the operator <br />shall inform the Division immediately. If total waste placement is anticipa- <br />ted to exceed 25,000 yards 3 at the existing site, the operator shall complete <br />a stability analysis of the existing coal processing waste site and structure <br />to ascertain its conformance with the regulations of Rule 4.10. If the total <br />quantity of coal processing waste exceeds 25,000 yards3 at the existing dis- <br />posal site, that structure shall be brought into conformance with the perfor- <br />mance standards of Rule 4.10 within 6 months thereafter. Furthermore, in <br />