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Logan Wash Mine TR No. 7 <br />3.1 Barrowing Methods <br />Barrowing of soil will take place in three stages, (1) surface preparation, (2) removal of topsoil, <br />and (3) removal of subsoil. <br />Surface preparation will include grubbing of the ground surface to remove all vegetation and <br />loose surface rock. This work will be conducted with a D-6 Caterpillar bulldozer. All grubbed <br />materials will be pushed and placed on the perimeter of the permitted area. Care will be taken <br />not to remove significant amounts of topsoil during the grubbing process. <br />After grubbing is completed, topsoil removal will be conducted. During initial soil removal <br />work, the general volume of topsoil and subsoils will be assessed. In general, topsoils will be <br />barrowed followed by subsoils. If however, it is determined that an adequate volume of quality <br />subsoil is present, some topsoil may be stockpiled on site and saved for reclamation of the <br />barrow site. <br />The removal and stockpiling of topsoil will involve removal of the A horizon, or that zone which <br />is most organic-rich. This work will be conducted with a D-6 Caterpillar bulldozer. The <br />thickness of the topsoil layer will be defined and monitored on site during the stockpiling <br />process. It is expected that this material will vary in thickness and therefore removal depths are <br />expected to vary as well. The topsoil will be stockpiled near aload-out excavation located near <br />the axis of the drainage at the grade of Logan Wash Road. This load-out is anticipated to consist <br />of a widened portion of Logan Wash Road with the soil barrow area located immediately to the <br />north (the road cut area). <br />The removal of subsoil will involve removal of the B or lower soil horizons, (subsoils that are <br />not organic-rich). It is anticipated that the mined subsoil layer will vary in thickness, probably <br />ranging from one to two feet. Soil of good quality and consistency, i.e, of relatively high fine- <br />grained content, will be the material of preference. The quality of subsoil will be monitored on <br />site during the barrowing process. Because subsoil composition and thickness is expected to <br />vary, the total depth of the barrow area is expected to vary, possibly by several feet. <br />It is estimated that 3,000 to 6,000 cubic yards (yd3) of soil will be generated at this site. Removal <br />of soils will be conducted with a D-6 Caterpillar bulldozer. An end loader and dump trucks will <br />be used to load and transport the soil to the Logan Wash Mine site, a distance of approximately 2 <br />miles. Appropriate traffic controls will be used to facilitate efficient and safe transportation of <br />the soils to the mine. <br />3.2 Erosion Control <br />During soil barrowing operations, OOSI will install and maintain erosion control structures to <br />mitigate the potential of excessive erosion due to storm run-on and runoff events. Silt fencing <br />will be installed at the downgradient perimeter of the disturbed area. Runoff channels will be <br />constructed and maintained at the toe of the excavated area and along the Logan Wash Road to <br />capture and direct runoff to existing storm runoff detention basins along and below the road. <br />Western Wafer & Land, Inc. <br />