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SOILS INFORMATION <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 /> is clear that the actual salvage depth is defined by the presence of increasing alkalinity in the soil. <br /> That characteristic is hard to identify by itself without a pH meter and frequent soil testing. But a <br /> good indicator that the higher alkaline subsoils have been reached is the presence of soft masses of <br /> calcium carbonate which would be whitish globs in the soil. Typically this increase in calcium <br /> carbonate occurs rather abruptly. Therefore when salvaging the soil, if these soft, whitish globs are <br /> encountered salvage of topsoil should not go any deeper. The rest of soil horizon however can also <br /> be saved separate from the topsoil and effectively used as backfill. <br /> The Nunn clay loam soil is very easy to identify as it does not support trees and the soil has <br /> very little rock contained in it. This is an excellent soil and as much of it as possible should be <br /> saved. The diagram indicates that the maximum safe salvage depth is about 24". However, salvage <br /> to as deep as 36" would not be out of the question provided those deeper soils do not contain too <br /> much calcium carbonate. Like the Curecanti Variant, carbonate masses typically begin to appear <br /> below about 24" in depth and that indicates increasing alkalinity in the soil. The soil below about <br /> 36" should not be saved as topsoil as it is alkaline and would cause problems in revegetation. So, in <br /> summary, for the Nunn clay loam, salvage to 24" should be safe almost everywhere, and where the <br /> calcium carbonate is not present or present in very low amounts below that depth, salvage can <br /> occur to as much as 36". <br /> The typical Roygorge soil is very thin and intensely rocky. It is unlikely that much soil can <br /> be saved from areas occupied by this soil. At best, salvage to about 6" is all that is typically <br /> possible, but even that would contain mostly rock. It is probably not worth spending much effort <br /> salvaging soil from locations occupied by this series as what would be acquired would not be of <br /> much value. However, the soil survey information indicates that within areas occupied by this soil <br /> there can be pockets of deep, good quality soil. That soil is probably a lot like the Curecanti <br /> Variant, but would not occupy large areas. Therefore, if a deep pocket of soil is encountered in an <br /> area occupied by the Roygorge series that soil should be saved following the same criteria used for <br /> the Curecanti Variant. <br /> Where previous mining and disturbance occurred, there are no natural soils left. However, <br /> various stockpiles scattered about the site contain soil materials that can be used. These piles should <br /> be saved and used for reclamation as some of these soils are derived from the Nunn clay loam. <br /> Table Mountain Quarry - Castle Concrete Company Exhibit I Page 1-2 <br />