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It is Colony's intent to stockpile topsoil at construction sites <br />and replace it so that these agricultural soils will continue <br />to be used as pastureland. <br />The water intake facility site has the same ecological constraints <br />as the terminal facilities area but currently exists as rough <br />shrubland suitable only for low intensity livestock grazing. <br />Colony intends to remove, stockpile and replace the existing <br />topsoil and establish salt and drought tolerant grass and shrub <br />species which require little management and will equal or exceed <br />the present utility of the site. <br />PROCESSED SHALE RECLAMATION RESEARCH <br />Colony has funded a decade of investigation concerning processed <br />shale effects on plant germination and growth in order to formulate <br />• a practical and successful revegetation program. Such studies have <br />concerned revegetation of and moisture movement within processed <br />shale embankments and are discussed below. <br />REVEGETATION <br />Early studies established that the processed shale from the <br />TOSCO II process, which has a silt loam texture, is high in soluble <br />salts and low in available phosphorus and nitrogen. The range of <br />values for other mineral nutrients were found to be low to adequate, <br />but within the range found in soils in most of the western states. <br />The earliest study plots were established in 1965 by Charles <br />Haberman of TOSCO at the pilot plant in Sheridan, Colorado. <br />These plots no longer exist following the construction of the <br />new TOSCO pilot plant at Rocky Flats near Golden. These studies <br />• <br />E-17 <br />