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Page 9 <br /> 6.4.5 EXHIBIT D — Extraction Plan <br /> Unit 3 soils commonly form within floodplains. As a result, differing states of soil formation <br /> may exist within the soil unit designation; such as soils with little horizon development like <br /> Entisols and Inseptisols. Mollisols with deep well-developed horizons may exist in the <br /> minority and the near fringe of planned extraction. Refer to graphic above, and bleow. <br /> ncol Ince tisol Molisol <br /> F+ nq <br /> s rY <br /> i <br /> - iVaaSnW> <br /> Soil Morphology <br /> With over a century of agricultural manipulation of area agricultural fields, <br /> prior mixing or importation of soils for land leveling, or flood plain <br /> management in the creation of levees, may have dramatically altered the <br /> original native soil profiles and properties. The native A profile of the upland <br /> terrace found within the agricultural Fields at the TRP, is predominantly <br /> modified as a plow (Ap) layer of 6.0± to 8.0± inches. The historic practice of <br /> incorporating manure into the plow layer should have served to maintain the <br /> organic base and quality of the cropped soils and accelerated soil horizon <br /> formation and development where it was lagging. Since the cropped soils <br /> have been irrigated, care should be taken not to salvage soils greater than <br /> 12.0± inches in depth to avoid mixing of potential accumulated salts. <br /> Generally, total soil depth (including all soil horizons) over the property may <br /> vary from approximately zero inches to four [4.0±] feet, yet predominantly <br /> having a shallow Ap plow layer of six to eight [6-8±] inches, lacking a B profile <br /> and having the potential for a mixture of silt, clay, or gravel outcrops over <br /> random areas. Gravel depth may occur from the surface to the underlying Fox <br /> Hills Sandstone varying at approximately 30.0± to 45.0± feet over the entire <br /> property. Suitable soil in excess of that needed for reclamation will be made <br /> commercially available to meet area infrastructure and residential demand. <br /> VARRA COMPANIES, INC. TWO RIVERS SAND GRAVEL AND RESERVOIR PROJECT MARCH 2O22 <br /> A REGULAR IMPACT[1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MIING&SAFETY <br /> OFFICE OF MINED LAND RECLAMATION <br />