2011-08-29_REVISION - M2005050 (6)

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J -Birds Mine 110(d) Permit M- 2005 -050 Technical Revision 02 The Upper Dump will form the pad for the mining operation surface facilities and the banks for the Upper Pond for surface water management. Side slopes for relevant areas of the Upper Dump will be sloped at 3H:1 V during material placement. 6. The Ore Storage Pad location and configuration will remain as built by Bluerock. 2.0 EXHIBIT E MINING PLAN MAP REVISIONS 1. The changes described under Section 1 "Exhibit C Mining Plan Revisions" are graphically depicted on the revised Exhibit E "Mining Plan Map" included as Attachment 1 to this revision. 3.0 EXHIBIT U ENVIRONMENTAL PROTECTION PLAN REVISIONS 1. A total of four monitoring wells have been installed at the J -Birds Mine site area beginning in April of 2010. One up- gradient well (Monitoring Well #1) was installed at the north- central permit boundary in April 2010. This well was dry during installation and has been monitored on a quarterly basis (as allowed by site accessibility) since installation, with all sampling events yielding a dry well. A total of three down - gradient wells have been installed since April 2010 in a progression south of the mine site area. Monitoring Wells #2 and #3 were completed in April 2010 and the latest well (Monitoring Well #4) was completed in August of 2011. These down - gradient wells were installed ahead of the underground mine workings, which are progressing in a southerly direction, at various intervals calculated to avoid the cone of depression exerted by the underground excavation. The three down - gradient wells were all dry holes at the time of installation and have been sampled on a quarterly basis (as allowed by site accessibility) since their installation, with all well samples yielding a dry -hole result. The monitoring well locations are depicted on the Attachment 2 "J -Bird Mine Monitoring Well Locations" map. A log of each installed well is attached as Attachment 3 "J -Bird Mine Monitoring Well Logs." 2. The surface water management protocols at the J -Birds Mine were reviewed by Rimrock as a part of this technical revision in order to assess their adequacy in light of the changes to the surface facility layout for the mine site. The results of that review are discussed below. a. The site drainage remains consistent with the original Exhibit U Environmental Protection Plan submitted in 2009. The surface water runoff from the upper area is captured by the Upper Pond and discharges to the natural offsite drainage channel located immediately north of the pond location. Any surface runoff that bypasses the Upper Pond is captured by a drainage channel that routes the runoff to the Lower Pond. Surface water runoff from the lower area is routed by berms and diversion swales to the Lower Pond, which discharges to the natural drainage located immediately west of the Lower Pond location (see Attachment 1 revised Exhibit E "Mine Plan Map "). Rimrock Exploration & Development Page 3 of 4