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Mrs. Courtney G. Petre -2- May 3, 1984 <br /> III. Exhibit D - Mining Plan <br /> 1 . It has been a Division policy to require a 100 foot buffer zone of <br /> non-disturbance between mining operations and major creeks or <br /> rivers. Please revise the mine plan to provide at least a 100 foot <br /> buffer for the Eagle River or demonstrate in detail how the river <br /> will not be impacted by the proposed mining operation. <br /> 2. Based on the commitment to reapply 4 inches of topsoil to disturbed <br /> areas and the disturbed acreage of 51 acres, please show where this <br /> material will come from, where it will be stockpiled and how it will <br /> be stabilized if it is to remain stockpiled for more than one <br /> growing season. For your information for bonding calculations the <br /> rough estimated cost of importing the topsoil from off-site would be <br /> very expensive. <br /> Should the operator wish to reconsider the importation of topsoil , <br /> the following information will be needed: <br /> a) A detailed site-specific soil report which shows the available <br /> salvagable topsoil , <br /> b) The depth of topsoil to be salvaged, and <br /> c) The approximate the volume of topsoil to be salvaged and the <br /> volume of each of the topsoil stockpiles. <br /> 3. Because the elevation of the Streeme and Gates ditch remains at a <br /> rather constant elevation while the level of the river and adjacent <br /> terraces to be mined decrease in elevation to the west, please <br /> provide the ditch elevation at the eastern and western permit area <br /> edges. These elevations can then be used to compare with the <br /> proposed post-mining topography to insure proper reclamation. <br /> 4. It appears from photos of previous inspections of the site and from <br /> my April 4, 1984 inspection that water from the settling pond will <br /> be discharged into the irrigation ditch. If so, an NPDES permit <br /> will be needed for this operation. This permit is under the <br /> jurisdiction of the Colorado Department of Health. The Division <br /> recommends that the operator contact the Colorado Department of <br /> Health - Water Quality Division regarding this question. <br /> 5. During operation of the concrete batch plant, describe steps that <br /> Nottingham Sand and Gravel will take to prevent soil and water <br /> contamination. Although the batch plant is operated by another <br /> company, Nottingham Sand and Gravel is responsible for reclamation <br /> in this area. <br />