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slope configuration of approximately 0.8:1. <br />In conformattce with Rule 6.4.4(d), the operator will need to clearly define the maximum disturbance to be <br />expected at any one time throughout the life of the operation. Such maximum disturbance should take into <br />account [he existing highwall disturbances noted during the Division's April 8, 2002 site inspection as well as [he <br />plans for future expansion. The maximum disturbance at any one time must include the number of lineaz feet of <br />exposed highwall, height of each highwall, and slope configuration of each highwall. The need for blasting to <br />create benches as well as the need for backfill and grading to produce the desired slope confguration should be <br />clarified It will also be necessary to clarify, for each highwall face, whether needed backfill materials will be <br />available on that face or whether they will need to be transported from another location of the quarry. This <br />information is needed in order to ensure that the Walstrum Quarry operation is adequately bonded. Upon review <br />of the amended mining and reclamation plan, it is appazent that several existing highwall faces will be mined <br />through and will result in a more desirable slope configuration, thereby reducing the operator's need for blasting <br />to produce the desired slope configuration needed for final reclamation. However, it is also necessary to verify <br />that the maximum disturbance expected and corresponding reclamation cost will at least be adequate to cover the <br />cost of reclaiming the existing disturbances at the quarry if no additional mining were to occur. Under such a <br />scenario, the operator should evaluate the existing disturbances and determine what steps and costs would be <br />incurred by [he Stale of Colorado [o complete the desired reclamation plan. Therefore, the Division requests that <br />the operator evaluate and clarify which is greater, ie: the planned disturbance and associated reclamation cost, or <br />the existing disturbance and associated reclamation cost. Please respond. <br />9. In the event that blasting is needed to create the desired bench configuration for at least one or more highwall <br />faces, an itemized cost for each blast sequence should be included in the Reclamation Cost estimate. To assist <br />with these calculations, the Division has attached a copy of the Circes Cost Estimating Form for Surface Blasting <br />Work. The form includes a detailed description of specific information that will be needed by the Division in <br />order to calculate and verify costs for surface blasting Please review the attached form and respond with the <br />specific information needed in the event that blasting is needed to complete reclamation of the maximum <br />disturbance expected. <br />6.4.E EXHIBIT E -Reclamation Plan <br />10. The applicant mentions on page 19 that a secondary access into the quarry will be established. The <br />construction of such access will involve 1:1 slopes from the road surface up onto the surrounding hillsides and <br />[he 1:1 slopes will be stabilized with a series of 10' high x 10' wide benches, The applicant also mentions that <br />the elevation of the road will be lowered sequentially in phases and will ultimately match the final quarry floor <br />elevation. The existing azea where the secondary access will be constructed includes a mine bench/storage area <br />and long, steep outslopes at the angle of repose. Please evaluate the existing disturbance and future plans for [his <br />azea in the context of a "maximum disturbance" scenario and respond with a description and itemized costs of <br />reclamation measures needed at such a time. <br />Once again, I will look forward to your response on or before July 19, 2002 to allow adequate time for review <br />before [he July 25, 2002 decision date. In the event that you need additional time to prepare a response, you <br />may elect to waive your right to a decision within 90 days and request an extension of the decision date. Such <br />request must be made on or before July 25, 2002. Rule 1.8.1 states that changes and additions to the permit <br />application must be filed with the Division and the County Clerk and Recorder. The applicant must also provide <br />the Division with an affidavit or receipt demonstrating that the change or addition was filed with the County <br />Clerk and Recorder no later than the close of business on the day the change was filed with the Division. <br />