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2018-03-20_PERMIT FILE - C1981019A (3)
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2018-03-20_PERMIT FILE - C1981019A (3)
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Last modified
6/12/2018 7:38:33 AM
Creation date
4/25/2018 6:42:45 AM
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Template:
DRMS Permit Index
Permit No
C1981019A
IBM Index Class Name
Permit File
Doc Date
3/20/2018
Doc Name
Volume 1 Rule 4
Section_Exhibit Name
4.02 Throuugh 4.30
Media Type
D
Archive
Yes
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RULE 4 PERFORMANCE STANDARDS <br />from 6.9 to 7.8, macronutrients appear to be adequate for sustained plant growth, organic matter contents <br />are relatively high (3.7% to 6.3%), salt levels are low (EC ranges from 0.6 to 1.6 mmhos/cm and SAR <br />ranges from 0.3 to 1.8), cation exchange capacity (CEC) is in a normal range, and textures are clay loam <br />and sandy clay loam. Overall, topsoil and spoil at all mine sites have favorable characteristics and <br />provide a suitable plant growth medium. <br />At Colowyo, soil pH ranges from 7.5 to 7.8, macronutrients appear to be adequate for sustained plant <br />growth, organic matter contents are relatively high (3.7% to 4.8%), salt levels are low (EC ranges from <br />0.6 to 1.2 mmhos/cm and SAR ranges from 0.3 to 1.6), cation exchange capacity (CEC) is in a normal <br />range, and textures are clay loam and sandy clay loam. The detailed soil and overburden analysis for the <br />Colowyo Mine is provided below. <br />Parameter <br />Plot 18 <br />Plot 2b <br />Plot 31 <br />Plot 4d <br />Plot 5e <br />PH <br />7.5 <br />7.5 <br />7.5 <br />7.7 <br />7.8 <br />% OM <br />4.1 <br />4 <br />4.8 <br />4.1 <br />3.7 <br />NH4-N mg/kg <br />4.9 <br />4.6 <br />6 <br />6.1 <br />8.7 <br />NO3-N mg/kg <br />24.1 <br />19.1 <br />22.3 <br />13.7 <br />18.1 <br />P mg/kg <br />15 <br />9.6 <br />12 <br />7.8 <br />29 <br />K mg/kg <br />191 <br />210 <br />201 <br />95.1 <br />105 <br />Ca meq/L <br />4.9 <br />4.1 <br />4.4 <br />3.5 <br />5.5 <br />Mg meq/L <br />2.6 <br />1.6 <br />2 <br />2.4 <br />4.1 <br />Na meq/L <br />0.8 <br />0.6 <br />1.3 <br />1.9 <br />3.5 <br />K meq/L <br />0.2 <br />0.5 <br />0.4 <br />0.2 <br />0.2 <br />EC mmhos/cm <br />0.7 <br />0.6 <br />0.7 <br />0.7 <br />1.2 <br />SAR <br />0.4 <br />0.3 <br />0.8 <br />1.1 <br />1.6 <br />CEC meq/100g <br />26.8 <br />22.1 <br />22.9 <br />27 <br />23.3 <br />% Sand <br />41 <br />51 <br />48 <br />39 <br />41 <br />% Silt <br />23 <br />23 <br />23 <br />23 <br />25 <br />% Clay <br />36 <br />26 <br />29 <br />35 <br />35 <br />Texture <br />clay loam <br />sandy clay loam sandy clay loam <br />clay loam <br />clay loam <br />aPlot 1 = 18 inches of <br />topsoil, strip <br />seeding in alternate rows. <br />bplot 2 = 6 inches of <br />topsoil and surface manipulation, seeded with native <br />shrubs and low competitive <br />forbs. <br />'Plot 3 = 6 inches of topsoil, strip seeding in alternate rows. <br />dplot 4 = Non-topsoiled <br />spoil, strip seeding in alternate rows. <br />'Plot 5 = Non-topsoiled spoil, seeded with unpalatable native <br />shrubs and low competitive forbs and <br />grasses. <br />To evaluate the impact from wildlife browsing, elk proof fencing was constructed on one-half of each <br />treatment. <br />Colowyo Mine Specific Field Trial <br />At the Colowyo Mine, field trial treatments to be evaluated include five plot treatments as shown on <br />Figure 4.15-1. <br />1. 18 inches of live -haul topsoil over spoil with strip seeding. The strip seeding would include a <br />strip of native shrubs and native low -competitive forbs that would alternate with a strip of native <br />Rule 4 Performance Standards 4-45 Revision Date: 1/31/18 <br />Revision No.: TR -119 <br />
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