Laserfiche WebLink
• help increase soil organic matter levels. To prevent unnecessary contamination, adequate extent <br />of topsoil shall be salvaged from the edge of a road, embankment, ditch, cut slope, and toe of fill. <br />Topsoil will be removed by using self-loading scrapers, push scrapers, or other rubber tired <br />equipment. A dozer or road grader will also be used when needed to assist scraper loading, to <br />facilitate maximum topsoil recovery, and to help build and shape topsoil stockpiles. Where topsoil <br />exists on a steep slope and where there is enough room for scrapers to maneuver at the bottom <br />of that slope, topsoil will be removed by being pushed downhill with a dozer, picked up with <br />scrapers, then stockpiled or transferred directly to regraded areas. <br />A two-lift topsoil operation will be utilized for the two primary premine irrigated pastureland soil <br />types (30C and D70B), whereby the "A" and upper "B" horizons are salvaged separately from the <br />lower "B" and "C" soil horizons (1988 - 1996 disturbance area). <br />Specific Soil Map Units (1 E, 1 EW, and 808) at New Horizon 2 (1988 - 1996 disturbance area) are <br />more suited for one-lift topsoil salvage because they are very shallow to shallow, have little profile <br />development, and/or are excessively stratified. The salvageable topsoil from these units will <br />primarily be utilized, whenever feasible, in postmine dry pastureland area. One-lift topsoil will be <br />isolated from the two-lift topsoil during all soil handling operations. <br />A two lift operation will be utilized for the following irrigated pasture/hayland soil map units in the <br />proposed 1999 disturbance area: 98A, 98D, 98E, 98F, and 98G (Table 2.05.4(2)(d)-3). For these <br />soil map units, the A, Bt and Bw horizons will be combined for salvage in the first lift layer and the <br />Bk and C horizons will be combined for salvage in the second lift layer. <br />A two lift operation will be utilized for the soil map unit 98C in the proposed 1999 disturbance area <br />(Table 2.05.4(2)(d)-3). For this soil map unit, the A, Bt and Bw horizons will be combined for <br />salvage in the first lift layer and the Bk and C horizons will be combined for salvage in the second <br />lift layer. <br />A one lift operation will be utilized for the following soil map units in the proposed 1999 <br />disturbance area: 98B and 98H (Table 2.05.4(2)(d)-3). These soil map units will have all horizons <br />• combined for salvage purposes. A one lift method will be used due to the steep terrain (10 to 60 <br />(Revised 24 AUG 06) 2.05.4(2)(d)-12 <br />