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.. ,~.. Identification Sign will need to be changed to show current name, address, and telephone number of the permittee, pursuant to Rule 4.02.2. Because of the current temporary cessation status of the operation, the mine identification sign will also need to include the name, address, and telephone number of the DMG office, pursuant to Rule 4.30.1(3). We recommend the Denver office information be presented on the sign. Permit on File With: Coal Program Colorado Division of Minerals and Geology 1313 Sherman Street, Room 215 Denver, Colorado 80203 Phone No. (303) 866-3567 In reviewing recent Annual Hydrology Reports (AHR's), our hydrologists have indicated that it would be helpful to have baseline water quality data presented in the AHR tables for both surface water and groundwater information. This could be done by adding an additional column of data, and would provide an easy way to identify overall water quality trends. We request that GVCC commit to include this information in future AHR's. The probable hydrologic consequences (PHC) sections of the McClane permit and AHR's discuss the fact that there is currently groundwater inflow into a sealed area of the mine, and that future mining would likely result in additional inflows, as mining extends further to the east into the predicted saturated portion of the Cameo seam. The PHC predictions do not address the possibility for perpetual discharge from the McClane Mine, in the years following final sealing of the portals. The PHC should be amended to address the potential for eventual discharge of water from the flooded workings, including the projected quality and quantity of potential discharge. If necessary, appropriate amendments to the reclamation plan should be provided, to ensure that any water discharged to the surface would be safely handled and would be in compliance with applicable water quality standards. Estimated reclamation costs were recently updated by the Division, in association with TR-09, and this mid-term review. The cost estimate indicated a total liability amount of $190,037.00 which exceeds the current bond amount held by the Division. The estimate, with supporting documentation, was submitted to you by letter of February 2, 1999. A performance bond in the amount of $190,037.00 will need to be provided by April 15, 1999, unless you can provide the Division with documentation to demonstrate a lower reclamation cost, prior to that time. In reviewing the bond documents on file, it was noted that the permit area legal description, which should be provided on page 1 of the form, had not been included.