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PERMFILE114462
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PERMFILE114462
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Entry Properties
Last modified
8/24/2016 10:10:34 PM
Creation date
11/24/2007 11:38:58 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Revision
Doc Date
12/2/2004
Doc Name
2.04.9 Soils Resource Information
Type & Sequence
PR10
Media Type
D
Archive
No
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West EIk Mine <br />• and X38. Mapping unit numbers 1, 6, and X6 are predominately shallow soils. hi these units the <br />composite sample was from the surface to the top of the bedrock. Mapping unit number 38 is a <br />deep forested soil and the composite sample was of the upper four feet. The samples represent an <br />average of conditions within the zone of maximum rooting of the most important components of <br />each mapping unit and aze not specific for any one major soil horizon. Exhibit 26 presents the <br />results of soil analyses conducted on the original 1976 mapping units for the West Elk Mine <br />study area. <br />1980 Soil Survey <br />During the 1980 survey, soil samples were collected for analysis in those instances where <br />substantial azeas of soil were mapped or when there was a question as to the relative suitability of <br />the mapping unit. <br />Soils were sampled and described by exposing the solum with a shovel and then sampling below <br />this point with a bucket auger. Samples were collected by soil horizon to that depth at which soils <br />appeazs suitable for topsoiling material. If this depth was questionable, samples were collected <br />below the depth in question to detemvne the chemistry of this material. Soil sample locations aze <br />indicated on Map 41. Samples were collected on August 20 and 21, 1980. Analysis was performed <br />upon submittal to Energy laboratories, Billings, Montana on September 11, 1980, using procedures <br />specified by the Wyoming Department of Environmental Quality. Exhibit 30 contains analytical <br />results for those soils sampled on the survey azea. <br />. General Limitations for Use: Permit Area <br />A brief summary of some of the major soil limitations, or lack of them, follows: <br />Salinity and Sodium Concentration <br />No mappable field evidence of detrimental accumulations of sodium or other soluble salt within the <br />normal root zones of plants high enough to affect the morphology of the soils was found. Localized <br />evidence was found of some detrimental sodium concentration around small seeps in areas of <br />mapping unit S located in Sections 8 and 17, Township 145, Range 90W. This was confirmed by an <br />analysis of one such azea which showed the soil to have 52 percent exchangeable sodium (refer to <br />Analysis Sample No. 179 in Exhibit 26); however, this applied to the very limited azea azound a few <br />seeps. Since these observations and results aze within the general azea but are outside the mine area, <br />it is unlikely that they will be involved in any direct mining or reclamation operation. <br />Calcium and Magnesium Carbonate Concentrations <br />Most of the soils of the study azea do not have horizons of secondary cazbonate accumulation. Units <br />16, 17, and 33 have such horizons but with the possible exception of unit 33, the genetic <br />concentration of carbonate is small to moderate. Calcium carbonate equivalents in units 16 and 17 <br />range from about 4 to 15 percent with an average estimated to be about 8 percent. <br />• Under normal circumstances the genetic concentration of cazbonates occurs below the zone of <br />2.04-129 7/94 PROS; 8/94 TR77; Revised Jun. l995 PR06, 11/04 PRI D <br />
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