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Peak Ranch Resource <br /> August 5, 2020 <br /> The proposed permanent rangeland seed mix(Table E-3)was developed for the Peak Ranch Resource site. <br /> Note that the rates given in Table E-3 are for a drilled application rate and rates will be double for a broadcast <br /> application. <br /> Table E-3: Permanent Rangeland Seed Mix <br /> basedSpecies' Plant Type Percentage of Mix(%, Project Drill Seed Mix <br /> Smooth brome Sodformer 15% 1.95 <br /> Mountain brome Sodformer 10% 2.0 <br /> Mutton grass Bunchgrass 10% 0.2 <br /> Western wheatgrass Sodformer 15% 2.4 <br /> Streambank wheatgrass Sodformer 10% 1.1 <br /> Prairie junegrass Bunchgrass 10% 0.1 <br /> Bottlebrush squirreltail Bunchgrass 10% 0.9 <br /> Indian ricegrass Bunchgrass 10% 1.2 <br /> Alfalfa Legume 10% 0.8 <br /> Total 100% 10.65 <br /> If an area is ready for seeding outside the optimal times for permanent seeding,fast growing annual cover <br /> crops may be planted to reduce erosion and dust generation during the first summer. The proposed seed mix <br /> for the Annual Cover Crop is listed in Table E-4, below. In this event, the permanent seed crop will be planted <br /> in the fall of that year. Permanent seeding windows in this area are typically before May 15 in the spring and <br /> after October 1 in the fall. <br /> Table E-4: Annual Cover Crop Seed Mix <br /> Species Drill Seeded Rate <br /> (Ibs PILS per acre) <br /> Annual Oats 30 <br /> OR <br /> Sterile Triticale 30 <br /> To ensure the establishment of a diverse and long-lasting vegetative cover,the Operator will employ site <br /> preparation techniques and protection.The soil shall be mechanically conditioned using discs and rippers, <br /> mulch will be spread and crimped after seeding, and temporary irrigation may be employed to ensure <br /> germination of as many seedlings as possible. Drill seeding will be utilized throughout the site. <br /> Certified weed free mulch will be crimped into the surface at 2000 lbs. per-acre. Furrows from discing will be <br /> left in the topsoil to provide moisture concentration and shade areas to promote better conditions for <br /> successful vegetation establishment. Seeding will occur in the first favorable season following the placement <br /> of topsoil. <br /> 8 Permanent vegetation seed mix consists of native species. <br /> 9 Rates are based on NRCS guidance(Plant Materials Technical Note No.59[revised],March 2012)for Critical Planting Area Planting in <br /> mined land conditions. <br /> 10 PLS=Pure Live Seed <br /> GrsT Icn ki and Ass-mt—11.1.4 E-4 O TETRA TECH <br />