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Wild Horse Dams and Reservoir West Test Quarry DRMS 111 Application <br /> to a tie-in point with the existing ground at the southeast corner of this test section. If the West Test Quarry Test <br /> Section 2 floor elevation generally stays above the existing ground (approx. Elevation 9144) at the southeast <br /> corner, no nonproduct rock-source material placement is necessary to achieve drainage. In any case, each test <br /> section will retain the maximum grade of 0.5H:1V for the rock-face side slopes, which will tie in to the 2%-sloped <br /> floor generally at the noth and west ends of the test sections. Rock-face side slopes will not be covered with <br /> overburden or surficial soils. Reference figures in Exhibit C for additional details. <br /> 6.3.4(1)(c)specify the measures that will be taken to revegetate the site, if applicable, including: <br /> (i) state the thickness of plant growth medium to be replaced. Sample and analyze available soils sufficiently <br /> to establish quantity and quality; <br /> (ii) state at what point in the mining plan the site will be seeded. Explain how the seedbed will be prepared to <br /> eliminate compacted conditions (e.g., plowed, chiseled, disced). State the type, application rate, and soil <br /> incorporation methods of fertilizer application, if any. NOTE:Soil amendments shall only be applied where soil <br /> tests indicate nutrient deficiencies for the plant species to be established; <br /> (iii) state the grass,forb,shrub and tree species to be planted and the applicable quantities.Specify the quantity <br /> of each grass and forb species as pounds of pure live seed per acre; <br /> (iv) specify the application method for grass and forb seeding. If the seed is to be broadcast, the application <br /> rate shall be twice the rate required for seed drilling. If the seedbed has not been adequately roughened prior <br /> to seeding, the seed shall be raked or harrowed after broadcast application; <br /> (v) if a mulch is needed, specify the kind to be used, the crimping method, and rate of application;and <br /> (vi) explain the establishment methods for each species of shrub and/or tree, and state the number of each to <br /> be established per acre. <br /> Revegetation will be implemented to establish a diverse, effective, and self-sustaining vegetative cover without <br /> continued dependence on irrigation,soil amendments,or fertilizers.The revegetation plan is designed to establish <br /> a native vegetative cover that is at least equal in extent to the cover of the natural vegetation of the surrounding <br /> area. The revegetation plan provides for good flexibility and success in native plant establishment. The plan <br /> considers site-specific environmental factors such as seasonal patterns of precipitation, temperatures, and wind. <br /> Other factors, such as soil texture, fertility, slope stability, and aspect will be considered as well. <br /> The disturbed area has a soil classification of Betermer soil. This soil type consists of shallowly-deposited, well <br /> drained, coarse-grained slope alluvium derived from volcanic breccia. The soil deposits can range from 0 to <br /> 11 inches deep on slopes; no soil deposits cover bedrock in rock outcrop areas which covers a substantial portion <br /> of the disturbed area.The soils are generally about 40 percent gravel or rock fragments and 18 to 27 percent clay. <br /> It is common to find very small root systems in the soil deposits. <br /> The growth medium will be kept free of contaminants so that it is capable of sustaining vegetation when <br /> reclamation begins. The growth medium will be located in areas where existing disturbance is ongoing to limit <br /> area of overall disturbance. At the end of the 0.5-1.5 year mining operation, grading work will be completed for <br /> each bench and slopes will be reclaimed the following planting season. <br /> 4.1.1 Growth Medium <br /> Growth medium will be developed from various available on-site sources, including topsoil,residual soil,and other <br /> types of surface materials excavated in the weathered portion of the profile that are not suitable for processing <br /> operations. The intent is to use available soil as growth medium during reclamation to enable establishment of <br /> suitable vegetation. No soil or growth medium will be imported for reclamation as there is material on-site that <br /> can be salvaged for reclamation. The growth medium will have a soil texture with 2-inch or finer particles <br /> Tetra Tech May 2024 20 <br />