Laserfiche WebLink
SOILS INFORMATION (not <br />Exhibit I <br />Soils Information <br />Exhibit C-IC is the soils map for this site. As the map shows, there is quite a variety of <br />soils present on the upper portions of Table Mountain, but within the area to be affected the soils <br />are quite uniform and composed of only two primary series. <br />The origin of the soils on the site is complex. Much of the soil is derived from the dark <br />quartzitic material, but a relatively high clay content in one of the soils found on the site is rather <br />difficult to explain as quartzite usually weathers to more sandy soils rather than clays. It is possible <br />that the clays were derived from volcanic action including hot springs and possibly the intrusion of <br />small rhyolite dikes. Nearby and surrounding the Table Mountain area are beds of gypsum that <br />clearly indicates a past history of mild volcanic activity and/or hot springs. Some rather small <br />outcrops of a rhyolite can be found in a few places. These mechanisms might explain the clay <br />content of some of the soils in an area dominated by quartzite. The clays could also come from <br />remnants of soils that were once more common and were found on top of the quartzite but have <br />largely been removed by erosion. Typically, the formation above the Dakota Sandstone is the <br />Pierre Shale which, if it was present, could have produced a clay dominated soil. The latter <br />explanation appears to be the most likely explanation for the presence and distribution of clay <br />dominated soils on this site. <br />Site Soils <br />At the end of this narrative are a series of descriptive summaries that define many of the <br />characteristics of the soils found on this site. These descriptions follow the units shown on the soils <br />map (Exhibit C-1C). Also included with these descriptions are diagrammatic figures that show the <br />typical cross-section of these soils. The descriptions also provide information on typical plant <br />species that occur on each soil, production rates, and various aspects regarding the utility of the <br />vegetation associated with each soil. Thus, this exhibit provides information not only on the soils, <br />but also relevant to the vegetation of the site. These data were derived from the recently completed <br />"Soil Survey of Fremont County Area, Colorado" published by the NRCS of the USDA. <br />Soil Salvage <br />The diagrammatic figures for each of the three primary soil series that occur in this area <br />indicate information pertaining to the quality of the soil at various depths in the typical soil horizon. <br />Each of those diagrams indicates the typical safe soil salvage depth. It is important to note that <br />these are the typical conditions. At individual sites the characteristics may vary somewhat from the <br />typical condition. In some instances soils belonging to other series may also be found in small <br />pockets. Therefore, when saving soils for use in reclamation good judgement always needs to be <br />exercised as to what depth soil salvage should stop. <br />In the stony Curecanti Variant, the most common soil on the site, the typical salvage depth <br />is about 16". That is, as a rule, all soil above 16" can be saved. In examining the typical profile it <br />Table Mountain Quarry -Castle Concrete Company Exhibit I (Amendment 1) Page 1 <br />