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Division's perennial vegetation cover requirement as per Rule 4.15.8. A total of 0.09 acres will <br />be excluded from the Phase H bond release. However, the liability time frame will not be <br />restarted for the 0.09 acres. As per Rule 3.03.1(5), the reclamation of temporary drainage control <br />facilities shall not be subject to the extended liability period of 3.02.3(2) or the bond release <br />criteria of 3.03.1(2). Waste pile disturbance is shown in Photograph No. 12. <br />Suspended Solids Demonstration <br />As part of Technical Revision No. 25, CAM provided a soil loss comparison for the reclaimed <br />areas at the Munger Canyon Mine site included in the Phase II bond release area. As part of the <br />review process for Technical Revision No. 25, the Division reviewed the parameters and results <br />for the suspended solids demonstration and has concluded that they are accurate and <br />representative of the Munger Canyon Mine site. The soil loss comparison demonstration can be <br />located in Appendix M(viii) of CAM's PAP. <br />As part of the soil loss demonstration, the Universal Soil Loss Equation was used to calculate <br />potential soil loss from the Munger Canyon Mine. Results were then compared to the soil loss <br />from the undisturbed adjacent baseline areas to determine if untreated drainage from the <br />reclaimed sites is contributing suspended solids in excess of pre- mining levels. Areas used for <br />comparison are the adjacent sage brush reference area for the waste pile and the adjacent juniper <br />woodland reference area for the mine portal. Location of the reference areas can be found on <br />Figure 4.8 -2 of the PAP. <br />The outcome from the soil loss comparison calculations show that the adjacent baseline areas <br />have a greater potential for soil loss due to erosion in comparison to the reclaimed portal, access <br />road and refuse waste areas. Potential soil loss results for the reclaimed portal area and its <br />associated juniper woodland reference area are 7.89 and 12.56 tons per acre per year respectively <br />to erosion. Similarly, potential soil loss results for the mine waste pile and its associated big <br />sagebrush shrubland reference area are 0.86 and 1.33 tons per acre per year respectively to <br />erosion. The demonstration's results show that untreated drainage from the reclaimed areas will <br />contribute fewer suspended solids to stream flow or runoff outside the permit area than untreated <br />drainage from the natural surrounding undisturbed areas. <br />Visual inspection at the Loma loadout shows that the vegetation cover at the loadout site is <br />sufficient for erosion control as per Rule 4.15.10. During the inspection, no signs of rills or <br />gullies were observed and sediment deposition was not encountered along the loadout site. <br />Summary and Conclusions <br />Based upon a review of the mine permit, the applicant's bond release application, and site <br />inspections, the Division finds that CAM Mining, LLC has replaced topsoil in accordance with <br />the approved reclamation plan. CAM Mining, LLC has established vegetation which supports <br />the approved post mine land use and meets the approved success standard for vegetative cover <br />with the exception of the above mentioned 0.09 acres located at the mine waste pile. The <br />Division finds that the reclaimed area subject to this bond release is not contributing suspended <br />solids to stream flow or runoff outside the permit area in excess of premining levels or in excess <br />