Laserfiche WebLink
The mine plan map and the report maps aze not labeled or sequenced in a compatible <br />manner. This causes confusion when trying to follow the reports recommendations with <br />the revised mine plan map. Furthermore, the reports seem to contradict one another as to <br />the best way to proceed depending on which impact is being mitigated. There appears to <br />be two major azeas of concem with respect to potential impact and mitigation measures. <br />These are the irrigation wells and the wetlands. The decision to wet mine in general <br />appears to have greatly alleviated the potential impact to the adjacent wells since the <br />draw-down now appears to be almost negligible with respect to the available saturated <br />thickness. It should be noted that these aze the report's conclusions and it does not <br />appear that a mitigation plan is being proposed in the event these projections aze <br />inaccurate. Are there any proposed mitigation plans, and if so, what are they? <br />On the other hand, the potential impact to the wetlands from a 1-3 foot draw down could <br />be substantially more damaging. Therefore, the proposed mining sequence to best <br />mitigate the impact to the wetlands should probably be the primary plan from which to <br />proceed. It appears that the mining sequence in the wetlands report addresses the impact <br />to both areas of concem in the most balanced way. Given this assumption, figure 5 from <br />the wetland report and Exhibit 3 (Mine Plan Map) need to be coalesced into a single <br />logical mining sequence (along with the reclamation plan map and the extraction plan <br />map). Presently, it does not appear that Exhibit 3 follows the mining sequence <br />recommendations proposed in the wetland report or the well report. Furthermore, the <br />starting point, ending point and mining direction in each mine area should be cleazly <br />illustrated. This will allow our office to properly gauge the potential impacts as indicated <br />from the lake leveling effects. <br />Another area that needs clarification is the proposed monitoring plan and the submittal of <br />all available data. It appeazs that monthly monitoring has occurred since installation of <br />the wells, however, the last data submitted is for October of 2001. Please provide all <br />additional data that has been collected to date. Second, please submit a proposed <br />monitoring plan that will provide a solid baseline, will track fluctuations throughout the <br />life of the mine, and will provide a trigger for implementing mitigation measures. <br />In summazy, a single cohesive mining, monitoring, and mitigation plan that combines the <br />various elements from both studies and any other aspects of the mining operations should <br />be submitted for our review. This will provide a single point of reference for all the <br />parties involved to work from prior to mining, and once the actual disturbance begins. <br />6.4.8 Exhibit A -Wildlife Information <br />The staff will await your response and final mitigation proposals on the water <br />information prior to addressing this area in any more detail. <br />6.4.12 Exhibit L -Reclamation Costs <br />We will not be able to finalize the bonding costs until some of the previously identified <br />concerns are addressed in more detail. However, a preliminary estimate is being <br />