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• Exhibit I - Henderson Mine and Mill Permit Amendment <br /> SOILS and TOPOGRAPHY <br /> Soils <br /> Extensive soils characterizations were conducted during development of the original <br /> Henderson Mine and Mill reclamation plan in 1977. These data, including a detailed <br /> soils map, are included in that plan as Exhibit I and are incorporated into the existing <br /> Permit (M-77-342). For continuity and ease of reference, pertinent portions of those <br /> data are excerpted for this exhibit. Updated information is included where available. <br /> Soils of the Henderson Mill/upper Williams Fork River Valley area are typical of the high <br /> mountains. Soil materials have formed on a variety of topographic formations varying <br /> from rocky uplands to bottom lands. As many as 19 soil families exit in the area of the <br /> • Mill. The USDA Soil Conservation Service Comprehensive Soil Classification System <br /> shows the following orders to be present at the Henderson Mill site: Inceptisols, Alfisols, <br /> Spodsols, Histisols, and Mollisols. <br /> Based upon the information provided in the original permit, the most common soil type <br /> along the conveyor route in the newly affected area is a well drained Typic Cryochrept <br /> developed from deeply weathered Precambrian bedrock materials. This type is <br /> described as "Soil No.13" in the original Permit, and a detailed technical profile <br /> description is presented in that document (page 6-17). <br /> Development of this Reclamation Plan for the overland surface conveyor targets <br /> management of the soil resource assuming a relatively uniform cover of Soil No. 13. <br /> Soil No. 13 is a Typic Cryochrept. This inceptisol, consistent with mountain forests in <br /> the region, is located in a cryic (cold) soil temperature regime and contains an ochric <br /> • epipedon (light colored, structured soil formations low in organic matter). Residing on <br />