1997-05-03_REVISION - M1977493 - Laserfiche WebLink

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(Page 2) MINE ID # OR PROSPECTING ID # M-77-493 INSPECTION DATE 4/29/97 INSPECTOR'S INITIALS ACS OBSERVATIONS Prior to the physical inspection of the Climax Mine site facilities, a meeting was held to discuss the remaining issues associated with permit amendment AM-003. Concurrence was reached on all of the outstanding technical issues, and Climax will be providing, prior to the May 21, 1997 decision date, a submittal addressing the Division's 4/20/97 adequacy review letter. Climax must also submit proof of notification of the Colorado Department of Transportation regarding the amendment AM-003 application. Also, as a result of the Division's adequacy review, the interceptor canals will be categorized as affected land. As such, the Forest Service will have to be notified of amendment AM-003 per Rule 1.6.2, since portions of the canals pass through or within 200 feet of public land. Holders of easements through or within 200 feet of the affected land need also to receive notification of the amendment application. The public comment period will have to be re-initiated to extend 20 days from the date of notification of these additional entities. Considerable data related to structural demolition costs were provided to the Division by Climax in a submittal dated 4/1/94. Several facilities in the Climax Camp area were inspected to gather information that was not included in the 4/1/94 submittal that will facilitate the Division's estimation of structural demolition costs for the Climax Mine. 1. Appendix B to the Climax submittal dated 4/1/94 contains information on the outside dimensions and length of the various conveyors at the Climax Mine. This information is sufficient to estimate costs for conveyor demolition. However, the Division also needs information on the concrete foundations for the conveyor supports in order to thoroughly evaluate demolition costs. The conveyor support foundations inspected were buried under deep snow, so no measurements of foundation dimensions could be made. It was discussed that the bearing capacity of the ground where the foundations are located would result in variability in the conveyor foundation dimensions in different locations at the site. Climax will research the construction drawings for the conveyors and provide the Division with concrete foundation information, specifically typical outside dimensions for the concrete foundations and typical spacings for the support structures and foundations along the lengths of the conveyors. 2, Appendix A to the Climax submittal dated 4/1/94 includes a list of substations at the Climax Mine (excluding Public Service substations) , and provides data on the areal extent of each substation. In order to thoroughly evaluate demolition costs for the substations, information is needed on the average height of the structures in the substations and the nature and extent of supporting concrete associated with the substation structures. Observations were made at several substations located in the camp. The 3-mill substation structures include steel framework with an average height estimated to be 20 feet. The PZSS sub is a small station with a wooden framework. Substation foundations could not be observed because of snow cover. For preliminary cost estimating purposes, the Division will assume an average height of 15 feet for the substation structures, and will assume that concrete slabs underlie the substation areas. These assumptions will result in conservative estimates of the cost to demolish the substations, but can be refined if Climax chooses to provide more detailed descriptions of the structures. 3. To facilitate estimation of demolition/removal costs for the various outdoor tanks and bins at the site, information on the nature and extent of supporting foundations is required. Observations were made at the open pit tank farm, one of the thickener tanks, and of the bulk fuel tank. It can be assumed, based on these observations and discussion with mine personnel, that the tanks are underlain by concrete slabs with perimeter footers. 4. Information pertaining to equipment, material, and debris storage areas is necessary to estimate the costs for disposal in order to allow reclamation of these areas. Data on the areal extent of mine bone yards is provided in appendix A to the 4/1/94 submittal. Typically, the Division assumes a depth of debris and materials in bone yards at five feet to calculate a debris volume. The bulk yard at the Climax Mine was inspected. Although snow cover prevented detailed observations, it was determined that there is considerable open area within the confines of the bulk yard where no materials or debris are