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<br />Table 4.9-4. Total topsoil need in BCY's at year end versus total topsoil stockpile inventory and reserves and <br />resultant surplus / (deficit). (1) <br />Overall topsoil situation in BCY's at vear end: <br />Year 1993 1994 1995 1996 1997 <br />Topsoil Stockpile Inventory 4,077,388 3,966,388 4,089,388 4,202,388 4,282,388 <br />Topsoil needed 2,999,993 2,889,480 3,012,093 3,125,027 3,205,693 <br />Surplus / (deficit) 1,077,395 1,076,908 1,077,295 1,077,361 1,076,695 <br /> (2) (3) (4) (5) (6) <br />Acres of disturbance 1,837 1,791 1,867 1,937 1,987 <br /> (7) 18) l9) (10) (11) <br />(1) Based on maximum production as calculated from PR-3. Figures may vary to reflect changes in mining operation. <br />(2) Based on average replacement depths of ± 2" accuracy. The topsoil replacement yardage may vary ± 493,900 bcy's for 1,837 replacement acres. <br />13) Based on average replacement depths o(± 2" accuracy. The topsoil replacement yardage may vary ± 481,600 bcy's for 1,791 replacement acres. <br />(4) Based on average replacement depths of ± 2" accuracy. The topsoil replacement yardage may vary ± 502,OD0 bcy's for 1,867 replacement acres. <br />(5) Based on average replacement depths of ± 2" accuracy. The topsoil replacement yardage may vary ± 520,800 bcy's for 1,937 replacement acres. <br />(6) Based on average replacement depths of ± 2" accuracy. The topsoil replacement yardage may vary ± 534,300 bcy's for 1,987 replacement acres. <br />(7) Includes 45 acres of cropland a[ 18" and 1,792 acres of r angeland a[ 12". <br />(8) Includes 1,791 acres of rangeland at 12". <br />(9) Includes 1,867 acres of rangeland at 12". <br />(10) Includes 1,937 acres of rangeland at 12". <br />(11) Includes 1,987 acres of rangeland a[ 12". <br /> <br />IT49-0] <br />FV Ll6 3/94 <br />