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TR -18 to Permit M- 1977 -342 <br />Environmental Protection Plan <br />17. PLANT GROWTH MEDIA AND REVEGETATION <br />The Henderson Mine and Mill site closure and reclamation plan are detailed in Section 9.0 of the <br />Mining and Reclamation Permit. The Permit has been modified as site conditions warrant and <br />reclamation technology advances. Generally, revegetation plays an important role in this <br />approved plan. While topsoil material (growth media) is not widely available to cover the 15 <br />acre mine site, it will be available to cover the tailings storage facility at the Mill site to an <br />average depth of 12 inches. Detailed soils information and maps are found in Section 6.2 of the <br />Mining and Reclamation Permit as modified. Tabular data that describe the results of chemical <br />analyses of soil samples is included in the 1989 Soil and Vegetation Studies Report that is a <br />component of the public record. <br />In addition, significant research relative to soils and revegetation has been conducted at <br />Henderson since the mid -1970s (Section 8.0 of the Mining and Reclamation Permit). Much of <br />this research, including soil /vegetation test plots, is revisited periodically to determine long -term <br />trends. <br />Recommendations on soil and revegetation material from the local Natural Resources <br />Conservation Service (NRCS) have been taken in to account as modifications to the Permit were <br />compiled and reviewed. <br />Climax Molybdenum Company <br />Henderson Operations <br />October, 2012 <br />Page 38 of 40 <br />