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_111%* COLORADO LEGACY LAND <br /> SCHWARTZWALDER MINE <br /> E.4.1. Replanting and Reseeding <br /> In 2016 the Biological Assessment 1 (IRIS Mitigation and Design Inc.,2016)was prepared in coordination with <br /> Technical Revision 23 to conservatively describe the replanting and reseeding requirements for the <br /> Schwartzwalder Mine site. Because the extent of the alluvial valley excavation was unknown, the Biological <br /> Assessment assumed a worst-case scenario in which the entire Excavation Area (up to 8-acres)would need to <br /> be excavated to bedrock and a new waste rock rile would need to be constructed across Ralston Creek. <br /> However,as shown in Figure E-2,the extent of the alluvial valley excavation is limited compared to the initial <br /> scope of the Biological Assessment. Gamma scans indicate that complete excavation to bedrock is unwarranted <br /> and CLL does not intent to create a new waste rock pile across Ralston Creek. Therefore,after the Final Status <br /> Survey report is complete, CLL shall prepare a final planting plan, describing the exact planting quantities, <br /> species,and locations. This planting plan shall be submitted to USACE,USFS,and DRMS to ensure compliance <br /> with all applicable permits. <br /> Any surficial areas that are disturbed, shall be reclaimed consistent with the current topography <br /> (approximately 15-30%slopes,as shown in Figure F-1),reseeded(seed mix shown below in Table E-1)and re- <br /> topsoiled consistent with Technical Revision 23,Attachment B Schwartzwalder Mine Environmental Protection <br /> Plan (Whetstone Associates Inc., 2016). CLL estimates that up to 7.1 acres of land in the alluvial valley shall <br /> need to be reseeded with the seed mix shown in Table E-1. The extent of the disturbed area is show on Figure <br /> F-1. <br /> TABLES-1. OBD. IX <br /> Species Scientific Name I Season %in Mix Seed lb lbs PLS* AC <br /> Native Grasses** <br /> Sand dro seed S orobolus cryptandrus Warm 15 5,298,000 0.1 <br /> Sideoats grama Bouteloua curti endula Warm 15 191,000 3.1 <br /> Streambank Elymus lanceolatus spp. Cool 15 156,000 3.8 <br /> wheat grass Psammo hilus <br /> Needle and thread Hesperostipa comate spp. Cool 15 115,000 5.2 <br /> Comate <br /> Thickspike Elymus laneolatus spp. Cool 10 154,000 2.6 <br /> wheat grass Lanceolatus <br /> Blue grama Bouteloua gracilis Warm 10 825,000 0.5 <br /> Canada wild rye Elymus Canadensis Cool 10 115,000 3.5 <br /> Native Wildflowers*** <br /> Black-eyed Susan Rudbeckia hirta Native 1.5 1,710,000 0.04 <br /> Sulfur flower Erio onum umbellatum Native 1.5 209,000 0.3 <br /> Prairie aster Maceranthera tanacetifolia Native 1.5 408,000 0.2 <br /> Purple prairie clover Dalea purpureum Native 1.5 210,000 0.3 <br /> Western yarrow Achillea millefolium var. Native 1 2,770,000 0.02 <br /> occidentalis <br /> Planic coreo sis Coreo sis tinctoria Native 1 1,400,000 0.04 <br /> 1 Schwartzwalder Mine-Phase 2,Biological Assessment,USACE File#NOW-2011-1353-DEN (IRIS Mitigation <br /> and Design Inc., 2016). <br /> AUGUST 2022 14 AMENDMENT 6 <br />