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<br /> <br />co <br />CD <br /><..\.} <br />".-1 <br />.\~ <br />(~ <br /> <br />Discount and Amortization Procedures <br />Without Plan <br /> <br />Appendix figure 1 illustrates the discount and amortization <br /> <br />procedures used to obtain the average annual cost (adverse effect) of <br /> <br />placing all of the center pivot corners of the Rio Grande Type IV <br /> <br />Study Area into wildlife habitat. Line (ad) represents the adjusted <br /> <br />difference between lines 1 and 2 in Appendix table 1. This was. the <br /> <br />annual cost (adverse effect) of placing center pivot comera in year <br /> <br />2000. A gradual buildup in center pivot irrigation comer placement <br /> <br />into wildlife habitat is assumed between years 1978 and 2000. <br /> <br />Following year 2000, a gradual shift to less intensive crops as de- <br /> <br />noted through the "OBERS" projections caused a decline in the cost <br /> <br />(adverse effect) in year 2000. This is depicted in Appendix figure 1 <br />as line (be) with a cost of $278,100. Line (cf) represents an <br />extrapolation to year 2078 with a cost of $76,800. The area oacf <br /> <br />was discounted to a 1978 value and then amortized for the 100 year <br /> <br />plan life period. ,This yielded an average annual cost of $179,700. <br /> <br />The Alternate Plan <br /> <br />Appendix figure 2 depicts the center pivot conversion to wildlife <br /> <br />cost for the alternate plan. Contrary to the without plan, the cost <br /> <br />(adverse effect) increases between years 2000 and 2020.~ This comes <br /> <br />about because the long range projects which were included in the <br /> <br />long range NED and alternate plans between 2000 and 2020 brought in <br /> <br />considerable additional center pivot irrigation. However, once the <br /> <br />program is completed, the trend toward less intensive production as <br /> <br />- 7 - <br />