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,Stoner E-ngineering & 15urverJing <br />Engineering, Testing & Surveying <br />The ditch along the south side of the old bath house building has experienced sedimentation as <br />a result of the stockpiled material waiting placement in the waste pile. This has allowed water <br />to accumulate in the area rather than flowing uninhibited into the west detention pond. The <br />ditch should be cleaned to ensure proper flow of onsite runoff into the west pond. <br />The culvert at the upper end of Reach 7, draining under the base of the haul road to the top of <br />the waste pile has experienced significant sedimentation and needs to he exposed at both ends <br />and cleaned (see Pic. 6). A significant spring storm could result in excessive erosion to the base <br />of the haul road. In addition, water can be trapped behind the haul road as well as within the <br />existing under drain for the waste pile. <br />The drainage for the overall site appears to be functioning but requires maintenance operations <br />to be completed now that the snow levels have receded and the ground has dried to some <br />extent to ensure that the drainage features continue to function as designed. The drainage <br />features have been constructed and will continue to function as stated in the drainage plan <br />submitted to the Division of Reclamation, Mining & Safety once the ongoing maintenance work <br />resulting from the significant snow accumulation has been completed. <br />Please let me know if you have any additional questions or concerns in regards to the issues <br />that are discussed above. <br />Sincerely, <br />Ryan M. Griglak, P.E. <br />Project Manager <br />P.O. Box 1163 28 South Washington Street Cortez, Colorado 81321 <br />970.565.7483 stonerenciineer0frontier.net 970.565.7704 <br />