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~ ~ III IIIIIIIIIIIIIIII <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman $t., Room 215 <br />Denver, Colorado 80207 <br />Phone: (7031 8hh~35h7 <br />FAX: (303)832-8106 <br />April 29, 1996 <br />Mr. Ken Jacobson <br />Western Colorado Regulatory Office <br />U.S. Army Engineer District, Sacramento <br />402 Rood Avenue, Room 142 <br />Grand Junction, CO 81501-2563 <br />1 <br />i. r..:1h ~... <br />i ( IS: <br />RE: Response to Public Notice No. 199475348, SANDCO, Inc., <br />Walker Pit, Colorado Reclamation Permit No. M-87-044. <br />Dear Mr. Jacobson: <br />~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Roy Romer <br />Governor <br />lames 5. Lochhead <br />Execuove Director <br />Michael B. Long <br />Division Director <br />The Colorado Division of Minerals and Geology (DMG), Durango field office, has reviewed <br />the project description for the Walker Pit, public notice number 199475348, and offers <br />the following comments for consideration. <br />DMG has not identified any major concerns with the mine plan proposed in the project <br />description for the Walker Pit. DMG concerns and reclamation plan requirements can be <br />adequately addressed by the operator through the Technical Revision and /or Amendment <br />process for the existing Colorado reclamation permit. One of the key issues to be <br />addressed by the operator regards clarification of the maximum depth of extraction in <br />relation to the channel bottom elevation. Current depth restriction for the Walker Pit is <br />defined as being the surface elevation of the river at low flow season. Additionally, DMG <br />will probably require development and implementation of an appropriate river channel <br />survey and continuation of a monitoring program to verify that no significant adverse <br />impacts to river channel stability are occurring as a result of gravel extraction activities. <br />DMG's experience with SANDCO, Inc., indicates that the operator complies with <br />Colorado reclamation statutes. Mining activities conducted by SANDCO, Inc., have <br />continuously exhibited a corporative attitude with regulatory requirements and an <br />awareness of environmental responsibility. <br />Please contact me at the DMG field office in Durango, 1474 Main Avenue, Room 207, <br />Durango, CO 81301-5182, phone (970) 247-5062, if I can be of greater service. <br />Sincerely, <br />l~~u~ ~~ <br />Wallace H. Erickson <br />Environmental Protection Specialist <br />