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<br />EFFECTS OF PROJECTED DEPLETIONS ON NAVIGATION <br /> <br />Season Years of Expected SerVlce for ProJected Level of Uevelopment and Time Frame <br />Length Cur-! Hinimum Host Likely Haximum Plan (1969)i <br />in rent: !lase w/o Coal Projection Projcction Projection Frame\~ork <br />Months 1970 ,19801 2000 2020 1980 2000 2020 19801 20001 2020 1980 2000i 2020 19701 1980 20001 20201 <br />(1) (2) I (3) (4 ) (5) (6) (7) (8) (9) (10) (11) (12) (13) i (14) (15) (16) (17) (IS) <br />. ! 62 I 24 <br />S 66 54 51 62 52 51 62 51 48 58 48 66 61 43 15 <br />7.75 I : 2 1 1 2 4 I 5 1 3 3 I <br />7.5 1 1 1 1 1 1 4 1 2 <br />7.25 1 1 1 1 2 6 1 1 <br />7 1 1 3 1 1 l 4 I 3 1 3 4 <br />6.75 I 2 2 2 2 2 I 5 2 1 2 5 <br />6.5 1 I 2 1 1 1 2 2 4 <br />6125 3 4 1 1 1 1 4 <br />6 3 2 1 2 3 . 5 7 <br />5.75 2 , 1 1 S 1 1 1 5 2 2 I 4 3 1 2 <br />I <br />5.5 2 I 1 1 1 4 1 1 1 1 3 2 2 1 <br />5.25 2 1 1 2 1 1 3 5 2 <br />5 I 1 2 3 1 3 1 1 1 i 1 1 <br />4.75 4 I 4 2 1 I 7 1 I 1 <br />4.5 2 2 2 I 2 2 <br />4.25 1 1 2 I 1 2 <br />4, 7 7 7 6 7 5 I 4 I 8 7 6 <br />Zero 1 2 2 3 I 2 5 I 5 I 11 1 13 <br /> I <br /> \ <br />Total 75 75 75 75 75 75 75 75 75 75 75 75 i 75 71 71 71 71 <br /> , <br />1\0. of J <br /> I <br />Years t I i <br /> \ <br /> . <br /> <br />NOTE: See Exhibits 3 & 4 for depletion estimates associated with each study. <br /> <br />Exhibit 6 <br /> <br />'i <br />