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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />June 15, 2015 <br />Matthew Sprague <br />Sprague Stone LLC <br />116 Sprague Ave. <br />Berthoud, CO 80513 <br />RE: Sprague Stone; DRMS File No. M-2015-006; Adequacy Review No. 2 <br />Dear Mr. Sprague, <br />The Division has identified several other comments and questions that must be addressed prior to <br />the' Division's decision due date. Please be advised that if you are unable to satisfactorily <br />address any concerns identified in this review before the decision date, it will be your <br />responsibility to request an extension of the review period. If there are outstanding issues <br />that have not been adequately addressed prior to the end of the review period, and no <br />extension has been requested, the Division will deny this application. <br />1. The Applicant has stated the working decks are comprised of 20% rock overburden. Please <br />specify the volume of overburden in the working decks of the three areas to be quarried. This <br />information is required to calculate the financial warranty estimate. The volume of <br />overburden shall be specified as cubic yards. <br />2. The Applicant has stated that waste rock generated from the quarry operation will be <br />contained within the active quarry area and that no stockpiles will be needed. Please describe <br />how this material will be contained within the active quarry area. Presumably this material <br />will need to be placed around the perimeter of the excavation in order to excavate slabs of <br />sandstone. Until such time as the waste rock has been graded onto the mine face, the Division <br />must bond for the replacement of this material. The applicant must specify the total volume <br />of waste rock that will need to be replaced onto the mine face for all three areas to be <br />quarried. The volume of overburden shall be specified as cubic yards. In addition, specify <br />average volume of waste rock which would need to be replaced on a per acre basis. The <br />Division will use this information to calculate the financial warranty liability for future <br />mining phases. <br />3. The Applicant's response to the Division's preliminary adequacy review did not include full <br />sized copies of the Stormwater Management Plan Map or of the Stormwater Management <br />Detail Sheet. Please provide the Division with full sized copies of these documents as <br />requested. <br />of • cod <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us I ' * i * <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director \ * *" <br />1876 <br />