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Wild Horse Dams and Reservoir West Test Quarry DRMS 111 Application <br /> comprising 40 and 80 percent of the finished soil. The surface of the growth medium will have between 20 and <br /> 60 percent cover of rocks averaging 3 to 12 inches in longest dimension. <br /> 4.1.2 Amendments and Mulch <br /> The Operator or a qualified subcontractor will test the growth medium before placement to determine the <br /> appropriate amendments for that specific portion of reclaimed slope. Soil tests will be performed at intervals as <br /> appropriate to represent soil conditions.Tests will measure micronutrients and macronutrients including nitrogen, <br /> phosphorus, and potassium. The Operator may apply additional soil amendments to facilitate soil-water retention, <br /> nutrient retention, and other deficiencies found during soil testing. <br /> 4.1.3 Seed Mixes <br /> The Operator will consult with a qualified reclamation specialist to update the reclamation seed mix.The seed mix <br /> will include species native to the reclamation area which have aesthetic value, provide structure with some forbs <br /> and shrubs, and are palatable as browse or graze vegetation to establish long-term habitat for horses, deer, <br /> antelope,and other native wildlife. If any species are not commercially available at the time of planting,appropriate <br /> alternates will be substituted as recommended by a qualified reclamation specialist. Substitutions will be made <br /> based on the rate per square foot (not per pound). <br /> Table 4-1 presents two (2) potential seed mix options and application rate where PLS = Pure Live Seed. Seeding <br /> will be done in September-December of each seeding year. Irrigation is not necessary for successful native <br /> vegetation establishment. The seed mix will not be allowed to contain more than 0.5%weed seed. <br /> Table 4-1: Seed Mix and Application Rate <br /> Species Rate <br /> (Option A) (%PLS +/- 5%) <br /> Bromegrass Smooth 20 <br /> Intermediate Wheatgrass 20 <br /> Orchardgrass 15 <br /> Wildrye Dahurian 15 <br /> Slender Wheatgrass 10 <br /> Crested Wheatgrass 10 <br /> Ryegrass Perennial 10 <br /> Species Rate <br /> (Option B) (% PLS +/- 5%) <br /> Streambank Wheatgrass 20 <br /> Annual Ryegrass 20 <br /> Thickspike Wheatgrass 20 <br /> Mountain Brome 15 <br /> rSiberian Wheatgrass 15 <br /> Green Needlegrass 10 <br /> SEED MIXTURE TOTALS Minimum 95%Total <br /> (Either Option) <br /> Tetra Tech May 2024 21 <br />