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Table 1.4-2 Determination of Worst Case Bond Year <br /> Activity 2018 2019 2020 2021 2022 <br /> Topsoil Replacement <br /> Requirements (acres) <br /> Beginning Replacement Acres 1,928 1,963 1,844 2,030 1,670 <br /> Annual Removal Acres 93 77 261 24 - <br /> Annual Replacement Acres 58 197 74 384 82 <br /> Ending Replacement Acre Inv. 1,963 1,844 2,030 1,670 1,588 <br /> Grading by Year (LCY) <br /> 2020 2021 2022 <br /> L Pit 4,893,595 4,893,595 4,893,595 <br /> N Pit 250,000 371,699 5,559,392 <br /> N Pit T/L 1,534,748 4,636,125 <br /> Derringer Pit 1,054,417 <br /> Ash Pit 450,000 435,000 413,038 <br /> Total 8,182,760 10,336,419 10,866,025 <br /> 1-33 Revision: f k- vl <br /> Approved: <br />