with impoundment(s) on tribal land totaling 3% of the 22.4 million tons impoundment disposal in 2005. 101 Because this 2 nd group only comprises a very small 3% fraction of the annual CCR impoundment disposal tonnage, and to avoid adding another layer of complexity to the cost update which would only result in a very small (i.e.,
RIA 50- ye ar period Actual company planned or EPA estimated pond closure year CCR pond end of lifespan (tons/year) Cu mulative pond lifespan end (tons/year) % pond tonnage phaseout 2009 Total 0 0 0% 2010 Total 0 0 0% 2011 Total 0 0 0% 1 2012 Total 481,300 481,300 2.1% 2 2013 Total 40,400 521,700 2.3% 3 2014 Total 634,700 1,156,400 5.2% 4 2015 Total 599,450 1,755,850 7.8% 5 2016 Total 2,021,700 3,777,550 16.9% 6 2017 Total 189,300 3,966,850 17.7% 7 2018 Total 513,400 4,480,250 20% 8 2019 Total 838,400 5,318,650 23.7% 9 2020 Total 1,969,160 7,287,810 32.5% 10 2021 Total 183,100 7,470,910 33.4% 11 2022 Total 661,700 8,132,610 36.3% 12 2023 Total 410,800 8,543,410 38.1% 13 2024 Total 39,000 8,582,410 38.3% 14 2025 Total 477,700 9,060,110 40.4% 15 2026 Total 280,900 9,341,010 41.7% 16 2027 Total 27,600 9,368,610 41.8% 17 2028 Total 134,000 9,502,610 42.4% 18 2029 Total 36,200 9,538,810 42.6% 19 2030 Total 527,100 10,065,910 44.9% 20 2031 Total 170,350 10,236,260 45.7% 21 2032 Total 327,400 10,563,660 47.2% 22 2033 Total 746,500 11,310,160 50.5% 23 2034 Total 594,100 11,904,260 53.1% 24 2035 Total 473,000 12,377,260 55.3% 25 2036 Total 322,000 12,699,260 56.7% 26 2037 Total 742,800 13,442,060 60.0% 27 2038 Total 476,100 13,918,160 62.1% 28 2039 Total 825,900 14,744,060 65.8% 29 2040 Total 642,050 15,386,110 68.7% 30 2041 Total 1,009,100 16,395,210 73.2% 31 2042 Total 141,600 16,536,810 73.8% 32 2043 Total 992,010 17,528,820 78.3% 33 2044 Total 505,700 18,034,520 80.5% 34 2045 Total 104,400 18,138,920 81.0% 35 2046 Total 338,000 18,476,920 82.5% 36 2047 Total 326,800 18,803,720 83.9% 37 2048 Total 575,800 19,379,520 86.5% 38 2049 Total 788,300 20,167,820 90.0% 39 2050 Total 2,075,700 22,243,520 99.3% 40 2051 Total 121,900 22,400,000 100.0% Column total (2005 base) = 22,400,000 Exhibit 4J 25,000,000 20,000,000 15,000,000 10,000,000 5,000,000 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% - 2012 Total 2014 Total 2012 Total 2014 Total Projection of Future CCR Pond Lifespan Closure Tonnage 2016 Total 2018 Total 2020 Total 2022 Total 2024 Total 2026 Total 2028 Total 2030 Total 2032 Total 2034 Total 2036 Total 2038 Total 2040 Total 2042 Total 2044 Total 2046 Total 2048 Total 2050 Total Projection of Future Percentage of 2005 CCR Pond Disposal Lifespan Closure 2016 Total 2018 Total 2020 Total 2022 Total 2024 Total 2026 Total 2028 Total 2030 Total 2032 Total 2034 Total 2036 Total 2038 Total 2040 Total 2042 Total 2044 Total 2046 Total 2048 Total 2050 Total 103
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