2011-07-06_REVISION - M1977300 - Laserfiche WebLink

Home Browse Search

DIVISION OF RECLAMATION, MINING AND SAFETY Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 Phone: (303) 866 -3567 FAX: (303) 832 -8106 6 July 2011 Mr. Randy Whicker Health Physicist / RSO Cotter Corporation P.O. Box 1750 Canon City, CO 81215 STATE OF COLORADO asw, 1'ae. d' Z COLORADO D I V I S I O N O F RECLAMATION MINING — &— SAFETY John W. Hickenlooper Govemor Mike King Executive Director Loretta E. Pirieda Director Re: Schwartzwalder Mine, Permit No. M -1 977 -300, Technical Revision TR -18 Adequacy Review - Revised Dear Mr. Whicker: The Division of Reclamation, Mining, & Safety (Division) sent to Cotter Corporation (Cotter) on 23 May 2011 a preliminary adequacy review of Technical Revision (TR) Request TR -18. Based on subsequent meetings and correspondence, it is now mutually agreed that the plan submitted by Cotter in TR -18 was conceptual in scope and not progressed sufficiently to allow response to the Division's adequacy review. Henceforth, Cotter requested and was granted an extension for the TR until 5 August 2011. The Division hereby provides the following Revised Adequacy Review which presents the issues that must be addressed before the TR can be approved. This letter supersedes the adequacy review letter sent by the Division dated 23 May 2011. The Division has also been made aware that portions of the proposed pipeline, associated structures and ground disturbance activity fall outside of the current permit area near the downstream terminus of the pipeline and associated cutoff structure. Therefore, Cotter will be required to submit an Amendment to add the necessary additional acreage required to contain the pipeline, associated structures, and ground disturbance. The approval of TR -18 will be conditional and subject to the stipulation that the Amendment be approved and financial warranties for both the TR and the Amendment be posted before any activity may proceed that is inside the acreage to be added under the new Amendment. Adequacy requirements: 1) Provide a map that, at a scale that displays appropriate detail, depicts the mining reclamation permit boundary in relation to the proposed diversion structures. Appropriate detail should be sufficient for the Division to determine whether the disturbance necessary for the diversion structure construction can and will be accomplished within the affected area boundary. 2) Provide a detailed construction schedule for all components of the diversion structure and any preparatory activity such as coffer dams, temporary diversions, etc. 3) Provide the proposed thickness of the 42 -inch diameter welded steel pipe. 4) Indicate whether there will be an access road along the length of the pipeline for maintenance and its location with respect to diversion structures and the permit area. Office of Office of Denver • Grand Junction • Durango Active and Inactive Mines Mined Land Reclamation