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.- Posl OILce Bo: 2140 Meeker. Coblado 81641 Tek Ohone 303'878'4021 August 24, 1982 1 17 1 Northern j~.. Coal \.! Company Mr. Dave Shelton, Director Mined Land Reclamation Division Colorado Department of Natural Resources 1313 Sherman Street, F 423 Denver, CO 80203 aaa y~`$ 4. ~ I' 1~ Y' ! !I ., . ;:;,~ ~_ ai RE: Temporary Cessation of Operations Northern No. 1 Mine, Permit Ido. 79-9 Rienau No. 2 Mine, Permit No. 78-345 Dear itr. Shelton: This letter. will serve to formally notify you under the provisions of Rule 4.30.1, 'of the temporary cessation of operations at the Rienau No. 2 Mine and the continuation of temporary cessation of operations at the Northern No. 1 Mine, both north of P1eek.er, Colorado. The information required by the division under Rule 4.30.1 'is contained in the following narratives and attached information. Specific points of interest pertaining to the individual mines are emphasized. 1) Northern No. 1 Mine will be temporarily sealed using the design on the attached Exhibit A. The plugs are designed to insure the safety of people, livestock, fish and wildlife as well as to protect the coal resources and water quality with the flooding of the mine. If permanent sealing is called for in the future, the temporary seal can be modified for this function. Surface mainten- ance activities will continue to comply with the terms of existing approvals and applicable per- formance standards. 2) While coal production from the Rienau No. 2 Nine has ceased, there will continue to be some surface and underground maintenance activity. 3) All environmental protection activities and monitor- ing programs will be maintained according to the terms of the permits and applicable performance standards.