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ENT OF <br /> ` , Tye United States Department of the Interior <br /> vi p <br /> OFFICE OF SURFACE MINING <br /> Reclamation and Enforcement <br /> } aA Suite 1200 <br /> ggCH 3 505 Marquette Avenue N.W. <br /> Albuquerque,New Mexico 87102 <br /> JUL 1 51994 <br /> Mr. Steven Renner <br /> Division of Minerals and Geology <br /> 2148 Broadway, Suite B-3 <br /> Grand Junction, Colorado 81503 <br /> Re: Coal Basin Mine <br /> Dear Mr. Renner: <br /> As you know, the Office of Surface Mining Reclamation and Enforcement (OSM) <br /> (Bernard Freeman, Mike Rosenthal, and Hal Pranger) met with you (Division of <br /> Minerals and Geology (DMG)) at the minesite on June 20 and 21, 1994. In <br /> addition, on June 20, Jim Pendleton of DMG, as well as representatives from the <br /> U.S. Corps of Engineers, U.S. Geological Survey, U.S. Forest Service (USFS), and <br /> Greg Lewicki of Mid-Continent Resources, Inc. (MRI) attended the meeting. On <br /> June 21, OSM, DMG, USFS, and MRI met with representatives from the Crystal <br /> Valley Environmental Protection Association (CVEPA). <br /> This is a brief summary of those two meetings, decisions that remain, and <br /> outstanding concerns. <br /> June 20, 1994 <br /> The group walked from the Dutch Creek flume upstream to the Rock Tunnel Waste <br /> Piles. During this walk, an attempt was made to determine when the largest debris <br /> flow event in the Dutch Creek watershed occurred. It appeared from the evidence <br /> that it probably occurred in 1977. The location and alignment of the new Dutch <br /> Creek diversion were also discussed. It was determined that additional information <br /> was needed. The location and alignment of the diversion would depend on the <br /> kind of material within the facilities pad area, whether or not the sloughing of the <br /> south bank of Dutch Creek (at the old waste pile) is occurring because of Dutch <br /> Creek or from water seeping from the coal waste material. DMG is going to review <br /> the aerial photographs from the 1950's through 1990's to try and determine the <br /> amount of sloughing that has occurred. <br /> This sloughing determination will have an impact upon the location from where <br /> Dutch Creek will be diverted. The size of the proposed diversion was also <br /> discussed. In order to meet the requirements of the Colorado program, a <br /> permanent diversion must safely pass the 100-year, 24-hour storm event. <br />