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The Leadville Mill M 1990-057 <br /> EXHIBIT C—MILL PLAN <br /> Page 4-27 <br /> construct and place ballast tubes on the impoundment sides, install tailings slurry <br /> pipes to the impoundment, and install the decant water pumping station.18 <br /> The following activities were completed in 2014. <br /> GENERAL SITE PREPARATION <br /> • Stake tree clearing/topsoil removal limits for TSF. <br /> • Stake grubbing limits for existing tailings storage pad. <br /> • Slope stake storage pad for existing tailings. <br /> • Oversee tailings storage pad layout and grading. <br /> CLEARING, GRUBBING, TOPSOIL REMOVAL/STORAGE <br /> • Performed by contractor, monitored by Mill Superintendent and/or Owner's <br /> Engineer. <br /> • Quantity check between planned and actual material moved. <br /> IMPOUNDMENT EXCAVATION AND EMBANKMENT CONSTRUCTION <br /> • Performed by contractor, monitored by Mill Manager and/or Owner's <br /> Engineer. <br /> • Slope stake exterior and interior embankment slopes. <br /> • Red top embankment slopes as being constructed by contractor. <br /> • Grade top of subbase on interior slope and bottom of impoundment (±1") on <br /> 50ft grid. <br /> • Monitor compaction lifts, compaction equipment in conjunction with contract <br /> soils engineer. <br /> • Compact to 95% standard proctor, within 2% optimum moisture. <br /> • Soils engineer to observe, segregate suitable embankment material, and test <br /> placement of embankment fill during construction. <br /> The following activities will be completed in the Spring 2021. <br /> is A1AR1Q5 <br />