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TECHNICAL REVISION #017 - ROBINSON LAKE RECLAIM PIPELINE <br />Climax Molybdenum Company <br />Climax Mine - Permit # M-77-493 <br />INTRODUCTION <br />The Climax Mine (Climax) is a molybdenum mining and milling operation wholly owned and <br />operated by the Climax Molybdenum Company (CMC). Climax is located in the historic <br />Consolidated Tenmile Mining District within a private land block of approximately 14,000 acres <br />straddling the Continental Divide at Fremont Pass. The land ownership lies within Lake, Summit, <br />Eagle, and Park Counties. Climax, one of the world's largest primary producers of molybdenum, <br />was generally in continual operation from about 1917 until the mid-1980s. Climax operated briefly <br />in 1995. Climax remains a viable operation with ongoing and documented closure/reclamation and <br />composting operations, dust control, water treatment and compliance management, and general <br />property management activities. It is estimated that remaining economic ore reserves at Climax total <br />approximately 209 million tons. <br />The Mining and Reclamation Permit (Permit) required under the Colorado Mined Land Reclamation <br />Act of 1976 (Act) was approved by the Colorado Mined Land Reclamation Board (MLRB) in late <br />1977 (Permit M-77-493). The Permit was formally amended in 1980 (AM-01), 1989 (AM-02), 1997 <br />(AM-03), 2001 (AM-04), and 2006 (AM-05). In 2010, Climax submitted an application for AM-06. <br />This latest proposed amendment to Permit AM-77-493 is currently being reviewed by the Colorado <br />Division of Reclamation, Mining, and Safety (DRMS). In addition, 16 Technical Revisions JR) to <br />the Permit have been approved by the DRMS. TR-17 is the latest request for a Technical Revision <br />and is described below. <br />GENERAL DESCRIPTION <br />The Robinson Lake reclaim pipeline is part of the Climax process water reclaim system for recycling <br />water from the tailing impoundments. The Robinson Lake pump station and reclaim pipeline were <br />originally approved by DRMS in 2007 as part of the Climax Restart Project under TR-14. Since that <br />time, several design changes have occurred to the pipeline, including pipeline material and diameter, <br />and a portion of the pipeline route. <br />As described in TR-14, process water will be pumped to the mill for use in the milling circuit. <br />Recharge to Robinson Lake will be accomplished by transferring water from Tenmile Pond and <br />Mayflower Pond via the Tenmile tunnel. The replacement pump station and pipeline will be <br />operated at a nominal capacity of around 10,000 gpm. <br />As described in TR-14, the pump station will be equipped with three vertical turbine pumps. Space <br />is being allotted for a fourth pump to be installed at some time in the future as a spare. Internal <br />piping will be 36-inch diameter. The pump station building also will include a pipe chamber and <br />sump, generator, electrical/MCC room, and 15-ton overhead bridge crane. <br />The Robinson Lake reclaim water will be pumped from the pump station through the pipeline over a <br />distance of approximately 20,200 feet to the mill process water storage tank. The reclaim pipeline <br />will be 36-inch diameter and will be made of carbon steel of varying thickness (0.365 to 0.750 <br />