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Source of Reclamation Material—Fremont County Area, Colorado <br />Description <br />Reclamation material is used in areas that have been drastically disturbed by <br />surface mining or similar activities. When these areas are reclaimed, layers of <br />soil material or unconsolidated geological material, or both, are replaced in a <br />vertical sequence. The reconstructed soil favors plant growth. The ratings do not <br />apply to quarries or other mined areas that require an offsite source of <br />reconstruction material. The ratings are based on the soil properties that affect <br />erosion and stability of the surface and the productive potential of the reclaimed <br />soil. These properties include the content of sodium, salts, and calcium <br />carbonate; reaction; available water capacity; erodibility; texture; content of rock <br />fragments; and content of organic matter and other features that affect fertility. <br />The soils are rated "good," "fair," or "poor" as potential sources of reclamation <br />material. The ratings are based on the amount of suitable material and on soil <br />properties that affect the ease of excavation and the performance of the material <br />after it is in place. The thickness of the suitable material is a major consideration. <br />The ease of excavation is affected by large stones, depth to a water table, and <br />slope. How well the soil performs in place after it has been compacted and <br />drained is determined by its strength (as inferred from the AASHTO classification <br />of the soil) and linear extensibility (shrink -swell potential). Normal compaction, <br />minor processing, and other standard construction practices are assumed. <br />When the material is properly used in reclamation, a rating of "good" means that <br />establishing and maintaining vegetation are relatively easy, that the surface is <br />stable and resists erosion, and that the reclaimed soil has good potential <br />productivity. A rating of "fair" means that vegetation can be established and <br />maintained and the soil can be stabilized through modification of one or more <br />properties. For satisfactory performance, it may be necessary to topdress with <br />better suited material or add soil amendments. A rating of "poor" means that <br />revegetation and stabilization are very difficult and costly. To establish and <br />maintain vegetation, it is necessary to topdress with better suited material. <br />Numerical ratings between 0.00 and 0.99 are given after the specified features. <br />These numbers indicate the degree to which the features limit the soils as <br />sources of reclamation material. The lower the number, the greater the limitation. <br />Soil Vegetation Properties <br />The map unit components listed for each map unit in the accompanying <br />Summary by Map Unit table in Web Soil Survey or the Aggregation Report in Soil <br />Data Viewer are determined by the aggregation method chosen. An aggregated <br />rating class is shown for each map unit. The components listed for each map unit <br />are only those that have the same rating class as listed for the map unit. The <br />percent composition of each component in a particular map unit is presented to <br />help the user better understand the percentage of each map unit that has the <br />rating presented. <br />Other components with different ratings may be present in each map unit. The <br />ratings for all components, regardless of the map unit aggregated rating, can be <br />viewed by generating the equivalent report from the Soil Reports tab in Web Soil <br />Survey or from the Soil Data Mart site. Onsite investigation may be needed to <br />U_SD� Natural Resources Web Soil Survey 6/26/2020 <br />i� Conservation Service National Cooperative Soil Survey Page 4 of 5 <br />