2013-04-22_REVISION - M1977211 - Laserfiche WebLink

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March 6, 2013 Transit Mix Aggregates Company / Castle Concrete / Continental Materials Corporation Pikeview Quarry CDRMS Landowner Notification Section a The quarry is located at 7250 Allegheny Drive, and currently holds a 236.5 acre permit with Colorado Division of Mining Reclamation and Safety. The proposed Inert Materials Repository will extend across 6.83 acres and was previously known as Area H. It is an existing pit within the quarry, and materials will be backfilled below grade. A temporary stockpile zone of 0.32 acres will be located on an adjacent bench to the pit. The areas associated with the inert disposal area extend across 7.15 acres as shown on Figure 1. Section b This action seeks to allow Castle Concrete Company to include 30,000 cubic yards of concrete for structural fill at the Pikeview Quarry in an existing pit slated for reclamation. Section c A signed affidavit certifying that the materials are clean and inert, as identified by CDRMS Rule 1.1(20) will be associated with each load and retained at the quarry office for a period of three years. Section d Inert material disposal will begin as soon as permitting is in place and will continue for five years. Section e The post- mining land use of wildlife habitat will not be influenced by the addition of as much as 30,000 cy of inert material at a site where 5.775 million cy will be cut. Section f Materials will be stockpiled at the elevation of the shop bench prior to placement in the pit, to allow screening of unacceptable materials as shown on the Plot Plan in Figure 1. The bottom of the pit is approximately 7,130 feet. The total quantity would not exceed 30,000 cubic yards and an affidavit would accompany the material brought on site (attached). Material will be placed in the pit not more than 1,000 cubic yards at a time. Limestone fines, produced onsite, will be added to the pit along with waste during backfilling to fill voids and minimize settling. It is anticipated that there will be less than 30,000 cubic yards of materials, and that the limestone fines backfill will compact the space between the concrete sufficiently to avoid significant differential settling. Remote - controlled dozers will push approved waste into the pit to be used as backfill. Material will be placed using heavy equipment normally found in the mining industry and standard construction practices will be followed to insure proper compaction.