2001-02-06_REVISION - M1983142 - Laserfiche WebLink

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APPLICATION FOR TECHNICAL REVISION HALL GRAVEL PIT M-1983-142 Mesa County Received FFB 0 6 2001 ~Maion of~ slats & Geology This application is submitted to the Division of Minerals and Geology and the Mined Land Reclamation Board to clarify and/or legitimize three situations that has developed at the Hall pit and the adjoining Ford Pit (M-1996-091) that United Companies operates in Mesa County. First, as described in the Minerals Program Inspection Report written by Environmental Protection Specialist Bob Oswald on December 19, 2000, an area of the Hall Pit has been affected by mining that was not part of the Permit's Areas to be Mined. This Technical Revision application seeks to add the area previously disturbed and an additional area to the approved affected area of the Hall Pit. As shown on the revised Mining and Utility Plan Map for the Hall Pit, the recently mined area is located approximately 690 feet to the north of the southern Permit boundary. Gravel extraction has affected approximately 4,000 square feet of the Hall Pit at this location. The gravel deposit at this area (Referred to as a finger ridge in the Inspection Report) is similar to that shown on the Hall Permit Mining and Utility Plan Map, Typical Mining Section (Hillside). Overburden is not 4 feet thick as shown on the Typical Section. Overburden thickness seen in the existing face of the excavation is one foot or less. The thickness of the gravel layer at the finger ridge is about eight feet. United Companies proposes to continue mining the finger ridge that runs to the west from the affected area (See the modified Mining /Utility Plan Map). The additional area affected by continued mining of this ridge will be about 12,000 square feet. Mining to the end of the ridge will remove all of the gravel that is available from the ridge. The volume of additional gravel from the ridge is expected to be 3,600 cubic yards. United Companies proposes that mining will proceed using the same methods that have been approved for mining the Hall Pit. As mining of the gravel proceeds, a berm will be left at the perimeter of the mining area as safety berm for the mining equipment and as a visual and noise barrier for neighbors. When the finger ridge has been mined to the end, the berms will be removed, soil will be replaced and revegetation will proceed as approved for the other aft ected areas of [he Hall Pit. The second problem that is addressed by this technical revision concerns a feature that was included in the original Mining Plan for this property. Thirty foot wide buffer zones were to be left between the Permit Boundary and all mining areas. The Ford Pit was permitted and developed after the Hall Pit and is located adjacent to the Hall Pit east boundary. The Hall Pit's 30 foot buffer zone at the HalUFord boundary was never formally removed as a part of the approved Mining Plan. In the Adequacy Review for the