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CLIMAY MOLYBDENUM COMPANY <br />September 17, 2001 <br />Via Certified Mail No. 7099 3220 0008 7289 8749 <br />Dear Mr. Sorenson: <br />Sincerely, <br />Lisa Berry <br />Environmental Technician <br />Climax Mine <br />A Subsidiary of Phelps Dodge Mining Company <br />Climax Mine <br />Hwy. 91 <br />Climax, Colorado 80429 <br />(719) 486 -2150 <br />Fax (719) 486 -2251 <br />ECEIVE <br />✓EP y 8 200 <br />Division of Minerals and Geology <br />Mr. Allen Sorenson <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street <br />Room 215 <br />Denver, Co 80203 <br />Re:4Iodification to Robinson Lake Seepwater Collection and Return System <br />Per your request, this is a construction certification for modifications made to the <br />Robinson Seepwater collection and return system Robinson Cutoff Wall during the <br />summer of 2000. The elevation of the freeboard was raised thus increasing the capacity <br />of the lower seep pond, and pumps at the pump station were overhauled at that time. <br />During the summer of 2001 both of the upper ponds were cleaned of sediment and a <br />culvert was replaced between them. There are currently no further modifications <br />planned. <br />If you have any questions or would like to further discuss these modifications please call <br />me at (719) 486 -2150 Ext. 755. <br />