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PERMFILE104333
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PERMFILE104333
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Entry Properties
Last modified
8/24/2016 9:57:35 PM
Creation date
11/24/2007 11:03:39 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980003
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
Baseline Soils Information
Section_Exhibit Name
1996 Appendix B
Media Type
D
Archive
No
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• Lithic Ct~rthents <br />These soils have a lithic contact within 50 cm of the soil surface and commonly at a depth appreciably <br />less than 50 cm. The soils may be saturated with water above the lithic contact when snow melts, but <br />because the watei is cold and is moving down the slope, reducing conditions are coo weak [o produce <br />mottles of low chroma. This lithic subgroup is also allowed to have permafros[. Where rock is shallow, <br />ice wedges and lenses must be thin or absent (1). <br />The Starman soil series belongs [o the Lithic Cryorthent subgroup. <br />SOIL CHEMICAL AND PHYSICAL PROPERTIES <br />The mine property was divided into two sampling units. Land north of County Road 53 was sampled <br />by the soil scientist at Yampa Mining Co. and land south of the road was sampled by VTN Colorado, <br />Inc. Soil samples and description sites were selected by considering aspect, slope, vegetation, and <br />previous soil classifiation by the SCS. Soil sampling sites were excavated to a depth of 152 cm (60 in.) <br />or to bedrock by the use of a backhoe. Soil profiles were examined and described according to USDA <br />Handbook No. 436, Soil Taxonomy. Exhibit T, HG Soil Survey Map, shows the soil mapping units <br />and sampling locations for the mine permit area. <br />The soil test results from the south side, which were analyzed by Colorado Analytical Labs, are <br />shown in Table 2 and the soil sampling depths for each horizon are illustrated on Table 3. In regard <br />• to providing sample depths on Table 2, [here tables were derived from soil horizons which were judged <br />to be representative of that particular soil series. Therefore, the summary presented in Tables 2 and <br />3 are composite results from similaz horizons-of the same soil series. <br />The analyses show a pH range of 6.5-8.2. There doesn't seem to be any trend of pH through the <br />profile except tha[ the A horizon appears to have been leached as evidenced by a slightly lower pH. <br />The electrical conductivity of the soils range from 0.3-1.1. From these results, none of the soil <br />horizons have high enough concentrations of sal[s to affett even the most salt sensitive plants. The <br />organic matter content is very high. This is significant since the organic matter supplies most of the <br />nitrogen available to vegetation. The A horizon contains the highest amount of organic mater. <br />Concentrations of organic matter range from 1.48.6%. The B horizon contains 2-4% less organic <br />matter than the A horizons. <br />Available phosphorus ranges from 434 ppm. The highest concentrations are in [he A horizons and <br />generally get progressively less down through the profile. Available potassium ranges from 110-220 <br />ppm. There isn't any pattern to the distribution of the potassium in any of the soil profiles. The <br />saturation ranges from 46.9-61.2% depending on the [exture. Generally, the higher the amount <br />of clay the higher the percentage of saturation. The sodium adsorption ratio (SAR) ranges from 0.8-2.6. <br />These values indicate that sodium will not be a potential problem. <br />Analytical results from soil samples taken on the north side of County Road 53 are shown in Table <br />4 and the soil descriptions are located in the appendix. pH values ranged from 5.8-7.3. The slightly <br />acidic soils are located in the B horizon of several Routt series soils. The lower pH indicates a possible <br />leaching out of carbonates. This does not pose any problems to reclamation since sufficient high <br />quality A horizon is present for use in reclamation. The electrical conductivity ranges from 0.14-0.66. <br />These values are very low and wouldn't adversley affect even the coos[ sensitive plants. Organic matter <br />1~ <br />
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