Laserfiche WebLink
The mean salvage depth for the 1E map unit is based upon the composition percentage of the <br /> two dominant soil types (Travessilla and Pinon) and two major inclusions (Rock Outcrop and <br /> Torriorthents). The calculated mean recoverable suitable topsoil depth is 0.8 feet (Table <br /> 21-4). This single lift of topsoil, with its 10 to 35 percent coarse fragment content, <br /> will primarily be utilized, whenever feasible, in postmine dry pastureland areas. <br /> 1EW - Lithic Haplaquolls. The Lithic Haplaquolls are located on the somewhat poorly to <br /> poorly-drained, nearly level to gently sloping small overflow drainages throughout the <br /> permit area. These long, narrow areas are overland drains for excess or non-used <br /> irrigation water. The Lithic Haplaquoll soils are shallow to very shallow, have dark <br /> colored organic matter enriched surface horizons, and have gleyed (mottled) subsurface <br /> horizons. Depth to ground water is typically 0.5 feet during the irrigation season. <br /> The mean salvage depth for 4 Lithic Haplaquoll profiles is 1.2 feet (Table 21-4). Topsoil <br /> salvage is restricted to this mean depth primarily due to sandstone bedrock at deeper <br /> depths. Additionally, topsoil will only be salvaged from this map unit if the profile is <br /> not saturated. The single lift of topsoil will primarily be utilized, whenever feasible, <br /> . in postmine dry pastureland areas. <br /> 30C - Progresso-Bond Complex. This map unit complex occurs on nearly level to strongly <br /> sloping soils on irrigated uplands throughout the study area. Both Progresso and Bond <br /> have well developed profiles with dark colored surface horizons and clay accumulation in <br /> the subsoil. Bond is shallow while Progresso is moderately deep. <br /> Recommended topsoil salvage depths are based predominantly on depth to bedrock and calcium <br /> carbonate content. Based upon 8 profiles, the shallowest soil in this complex, Bond, <br /> typically has suitable topsoil to a mean depth of 15 inches. The occurrence of indurated <br /> sandstone bedrock and high calcium carbonate contents prevent the salvage of additional <br /> topsoil. The mean salvage depth for 8 Progresso soil profiles is 29 inches. Again, <br /> topsoil salvage is restricted to this mean depth due to sandstone bedrock at deeper <br /> depths. <br /> The mean salvage depth for the 30C map unit is based upon the composition percentage of <br /> • the two dominant soil types (Progresso and Bond) and three major inclusions (Barx, <br /> Travessilla, and Bowdish). The calculated mean recoverable suitable topsoil depth is 2.1 <br /> feet (Table 21-4). The first lift topsoil (0.8 feet) will typically include the neutral <br /> 21-21 Revised 08/19/88 <br />