2013-02-15_REVISION - C1981020 (2)

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and approved at one time but were never constructed, were eliminated from the permit in association with TR -16 mine plan changes, approved in January 2004. During and following completion of reclamation grading work in the summer of 2007, the Division became aware of instances where final reclamation slopes, permanent channel specifications, and certain other elements of the final topography, differed from approved designs, to varying extents. The operator was requested to submit a technical revision application to address the circumstances that resulted in departures from the approved design, and to provide certified "as- built" topographic maps and specifications, demonstrating compliance with applicable regulatory criteria. The requested documentation was submitted in Technical Revision No. 22 (TR -22), which is currently under review. The proposed operation is in compliance with the requirements of this section. IX. Revegetation Baseline vegetation information for the Munger Canyon Mine can be found in Section 4.8 of Volume I; the Vegetation Map is included as Figure 4.8 -1 in Volume 2. The Division has reviewed this portion of the application and determined that the information is adequate. All previous concerns relating to the baseline vegetation information section of the initial permanent program permit application have been resolved. Revegetation plan information is presented in Section 3.5. 3.6, and 3.9, and Tables 3.4 -1 and 3.4 -2. The Division has reviewed the Munger Canyon Mine revegetation plan and revegetation criteria during the course of the original permit review, and numerous subsequent mid -term and permit renewal reviews. All aspects of the revegetation plan, including standards of success and methods of success determination are in compliance with applicable requirements. In Technical Revision No. 11, certain modifications were made to the revegetation plan within Section 3.9 of the permit application, primarily in response to BLM comments made during the public comment period. These changes included commitment to the use of certified weed free mulch, and modification to the reclaimed area fencing plans to accomodate livestock movement along the travel route in Munger Canyon. Additionally, based on the limited disturbance acreage, the requirement for quantitative interim revegetation monitoring was eliminated. The need for interim monitoring will be re- evaluated if qualitative observations indicate potential concerns with revegetation success. In Technical Revision No. 16, certain additional modifications were approved to the revegetation plan. TR -16 amendments included refinements to seeding techniques and seedbed preparation treatments, an amended permanent seedmix for the mine disturbed areas, and amended success standards. The Big Sagebrush Shrubland Seed Mixture was approved as the sole seed mix to be used for final reclamation of the mine area disturbances. This change was approved based on the very limited acreage of disturbance, and the fact that the 30