Laserfiche WebLink
The Leadville Mill M 1990-057 <br /> EXHIBIT C—MILL PLAN <br /> Page 4-22 <br /> was removed in accordance with the topsoil plan and stored in the existing topsoil <br /> storage pile. <br /> The sub-grade preparation thFOug*-45.m..il 1ORer nstallatien for the TSF +s was <br /> completed as follows: <br /> • Clear cut/log trees. Clear and grub organic matter including tree roots, pine <br /> needles, dead wood and other deleterious materials. <br /> • Clear topsoil and place in topsoil stockpile for reclamation. <br /> • Cut and fill to design specifications using contractor selected equipment. <br /> Equipment can include track dozer(s), backhoe(s), scraper(s), front end <br /> loader(s), road grader(s), sheep foot compactor(s), or excavator(s). <br /> • Fill material will have had a top size of 6in and contain approximately 50% silt <br /> and clay. <br /> • Fill wifl-be was placed in 10-12in level lifts and compacted by a self-propelled <br /> sheep foot roller. <br /> • Fill will be was placed and compacted to 95% of Standard Proctor dry density <br /> (ASTM D 698). <br /> • Fill will be was scarified between lifts. <br /> • Fill will be was moisture conditioned to within 2%of optimum. <br /> • Construction engineer will be was on site to provide testing during fill <br /> placement. <br /> The following subgrade preparation will be completed in the Spring of 2021. <br /> • Verify compaction of floor of pond by number of tests recommended by CTL <br /> Thompson. <br /> • Install Geocomposite Drainage Layer (GDL) between embankment and <br /> Geocomposite Clay Liner (GCL) to protect GCL during installation.15 <br /> • Install Bentomat® DN geosynthetic clay liner or equivalent. <br /> • Install TexDrain® TD 300 leak detection drainage net system, or equivalent, <br /> between the top of the geosynthetic clay liner and the bottom of the 45mil <br /> reinforced polypropylene capable of intercepting liquid within the leak <br /> detection zone and conveying the liquid to a collection sump for storage. <br /> 15 A1AR1Q5 <br />