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COLORADO LEGACY LAND <br /> SCHWARTZWALDER MINE <br /> TABLE E-1.SEED MIX <br /> Species Scientific Name Season %in Mix Seed lb lbs PLS* AC <br /> Blanket flower Gaillardia aristata Native 1 132,000 0.3 <br /> Purple coneflower Echinacea purpurea Native 1 117,000 0.3 <br /> Total 100 20.3 lbs PLS* AC <br /> Source: <br /> Technical Revision 23,Attachment B Schwartzwalder Mine Environmental Protection Plan,Table 7-2 (Whetstone <br /> Associates Inc.,2016). <br /> Notes: <br /> This upland seed mix is also included in the mitigation description portion of the USACE Section 404 Permit <br /> application and associated Biological Assessment for USFWS. Figure F-1 shows the anticipated extent of <br /> disturbed acres that will need to be replanted. <br /> *PLS/AC=Pure Live Seed per pound,per acre.If broadcast seeding,double the rate applied. <br /> **Colorado native grasses and wildflowers may be substituted with project ecologist approval only <br /> ***Wildflowers may be eliminated based on availability <br /> The soils and plant growth media used for reclamation are native soils from the alluvial valley excavation area. <br /> Section 17 of the Schwartzwalder Mine Environmental Protection Plan [Whetstone Associates Inc., 2016]) <br /> identifies these soils as fine-loamy to loamy-skeletal in texture. Loamy soils are well regarded as suitable plant <br /> grown medium because they are a mix of sand, clay, and silt. If additional carbon is needed to support <br /> vegetative growth, CLL shall cover the disturbed area (up to 7.1 acres, shown on Figure F-1)with 6-inches of <br /> imported topsoil. <br /> Section 7(b)(ii) of the Schwartzwalder Mine Environmental Protection Plan (Whetstone Associates Inc., 2016) <br /> provides the following description of seed and topsoil placement: <br /> "Topsoil Placement.Topsoil will be end-dumped on the crest of the slope and graded by dozers.Slopes will <br /> be graded to avoid concentrated water flow and subsequent erosion. Soil surfaces will be moderately <br /> roughened to allow the seeds to hold and some moisture to collect. Roughening can simply be the tracks <br /> of heavy equipment that has been used at the site for regrading. <br /> Seeding:Seeding will be accomplished by broadcast seeding followed by hydromulching.Hydroseeding is <br /> not recommended as it is not typically successful in an and climate. Table E-1 presents the seed mix to be <br /> used for the waste rock piles. <br /> Mulching:For 2HAV and steeper slopes, mulch is necessary to keep the seed and topsoil in place. Mulch <br /> can also provide shade to the seedlings and help the soil to retain moisture.Mulching will be accomplished <br /> by hydromulching with addition of a tackifier. Tackifier(Ecology Control MBinder) is a botanical glue <br /> made from Plantago insularis that can also be applied to the slope to prevent erosion. The hydromulch <br /> and tackifier should effectively stabilize the surface of the slope. <br /> Soil Amendments:Soil amendments may be required to improve the performance of the vegetation. This <br /> could include composted biosolids or manufactured amendments such as Biosol." <br /> The tree and shrub planting plan for the alluvial valley is based on the Biological Assessment which identified <br /> two planting phases of the remediation project: <br /> • Phase One discussed impacts from the installation of the cut-off wall and bypass pipeline,and <br /> AUGUST 2022 15 AMENDMENT 6 <br />