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Janet Binns <br />July 15, 2015 <br />Page 9 <br />Raton Creek Mine. (30.7 acres disturbed, 30.7 acres Phase III released) <br />Final bond release monitoring was performed by EFCI on the Raton Creek Mine in the <br />summers of 2004 and 2005. The Permit final bond release woody plant density standards was <br />initially 500 woody plants per acre. Examination of the original baseline vegetation shrub <br />density data reveals that the undisturbed areas adjacent to the reclaimed areas being sampled <br />for final bond release woody would not satisfy this revegetation success standard. EFCI <br />submitted TR -22 which was approved by the CMLRB, which revised the Permit final bond <br />release woody plant standard down to 167 woody plants per acre. This TR resulted in final <br />bond release being granted for this site. <br />According to Permit Pages 321 to 323, which correspond to the mine site and refuse pile <br />disturbance areas, the pre -mining shrub density of these areas averaged 203.8 woody plants <br />per acre. <br />Proposed Southfield Mine Woody Plant Density Revegetation Success Standard. <br />(106.3 acres disturbed, none Phase III released) <br />Examination of the reported forage palatability rankings of the fourteen shrubs encountered <br />during the sampling of the three reference areas located at the Southfield Mine and according <br />to the shrub density results presented in EFCI's response to the first CDRMS adequacy <br />response letter there are only two shrubs; Curl -leaf Mountain Mahogany and Yellow <br />Rabbitbrush which possess livestock palatability rankings of good or better which could be <br />considered for inclusion into the proposed Southfield Mine woody plant density revegetation <br />success standard. During the 2013 and 2014 bond release vegetation sampling, wherein a <br />total of 220 belt transects were evaluated a total of 183 Curl -leaf Mountain Mahogany plants <br />and one Yellow Rabbitbrush were encountered. Overall, the approximate average of these <br />two desirable woody plants would be 0.83 plants per 100 square meters or approximately 33.7 <br />plants per acre. <br />Upon comparing the current approved woody plant density revegetation success standards for <br />the four mines located in the Purgatoire River Valley evaluated in this assessment, reveals the <br />following trends. At the New Elk Mine, there is no woody plant density standard other than <br />that for the six shrub clumps. For the Golden Eagle Mine, "shrub density will not be used to <br />evaluate revegetation success." For the Lorencito Mine, there is a woody plant density <br />revegetation success standard of 500 stems per acre for the Pinyon -Juniper vegetation type <br />and shrub establishment areas located on the north facing slopes for the Grassland vegetation <br />type. There is no woody plant density revegetation success standard for the general <br />reclamation areas of the Grassland vegetation type. At the Raton Creek Mine, the woody <br />plant density revegetation success standard was approved and bond release granted with a <br />standard of 167 woody plants per acre. <br />According to these current and previous approvals by the Division, EFCI proposes the <br />following woody plant density revegetation success standards for the Southfield Mine. The <br />final revegetation woody plant density standard for the reclaimed areas at the Southfield Mine <br />site will consist of three aspects. <br />Firstly, the twelve shrub transplant areas planted by the Colorado State Forest Service with a <br />total of 1,843 shrubs and trees in May of 2004 containing an area totaling 6.23 acres will be <br />