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Dave Berry <br />December 9, 1997 <br />Page 3 <br />12. How many measurements of the mine inflows were made during 1995 that <br />lead to the constant 18 gpm value for June through December 1995 <br />indicated in your 1995 AHR? <br />13. In your 1996 AHR, the mine inflows for December 1996 are noted as zero. <br />Does this indicate that Bear did not treat and discharge any mine inflows or <br />that mine inflows ceased? <br />14. MCC's calculations of water discharge through the coal block between the <br />NW Panel sealed sump and the Bear Mine are based on the respective <br />mine maps of MCC and Bear. Can Bear representatives confirm that Bear <br />did not mine to the south of its prescribed boundary and, on the north side of <br />the Bear Mine, that mining stopped at the prescribed boundary all as <br />depicted on the maps? <br />15. Is there historical evidence of water at the Bear Mine with high electrical <br />conductivity values? What do the Bear AHRs indicate on this subject? <br />16. Please describe the ventilation system for the Bear Mine. Is the Bear Mine <br />now completely sealed? <br />17. Is there an existing means to monitor water accumulation within the Bear <br />Mine? Are you performing such monitoring? <br />18. CDMG has previously requested that MCC compute "time to fill" calculations <br />for the West Elk Mine, and to evaluate the PHCs associated with this <br />scenario. Please provide the comparable hydrologic analysis for the Bear <br />Mine. What are the projected PHCs, including slope stability, when the Bear <br />Mine is filled with water? <br />19. Please characterize the general water quality impacts to the North Fork <br />posed by Bear Mine operations, including both "point" and "nonpoint" <br />impacts. How has stormwater runoff from the mine site been managed <br />historically? How is it being managed now? How do these impacts compare <br />with those from the current Edwards Mine discharge? <br />20. From the onset of the landslide in mid-November to the present, have you <br />observed smoke emerging from cracks and snow melting in particular <br />locations? Were there any "hot spots° within the Bear Mine or adjacent <br />mines? <br />21. How might an underground fire affect the behavior of this landslide (e.g., <br />could fire compromise pillar integrity and stability, enhance secondary <br />porosity, "focus" groundwater flow discharges into the Edwards Mine, or <br />increase air pressure so as to impact slope stability)? <br />