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<br />I <br /> <br />8 <br /> <br />I <br /> <br />With more recent developments concerning the installation of major genera- <br /> <br />I <br /> <br />tion in the Four Corners area and the need for greater transmission capacity <br /> <br />from Glen Canyon and the Phoenix load center in the early years. it is necessary <br /> <br />I <br />I <br /> <br />to adjust the Bureau's estimated cost of the "yardstick system." Added capacity <br /> <br />might be introduced with additional lines or by increasing voltage to perhaps <br /> <br />345 kv. For cost adjustment here, however. the concept of 230 kv "backbone" <br /> <br />I <br /> <br />has been retained, The cost of increased capacity between Glen Canyon and <br /> <br />Phoenix mu~t be added so that adequate transmission will be available to market <br /> <br />. <br /> <br />Project power not needed in the Upper Division four-state area in the early years. <br /> <br />I <br /> <br />Otherwise, Project energy will be marketed to non-preference customers at non-firm <br /> <br />rather than firm prices. <br /> <br />I <br />I. <br />I. <br /> <br />Another adjustment necessary in the yardstick system is the deletion of <br /> <br />two 230kv lines between Glen Canyon and Four Corners. This change is consistent <br /> <br />with the' Bureau's own sketch of transmission lines needed if the utilities' <br /> <br />proposal is accepted. Since the Four Corners installation is assured and mutual <br /> <br />benefits of its interconnection with Project transmission so great as to make <br /> <br />I <br /> <br />this t~e a certainty, the saving to the Bureau of the investment cost in these <br /> <br />two lines will be realized regardless of whether or not the utilities' proposal <br /> <br />I <br />. <br /> <br />is accepted. The applicable investment cost of the "yardstick system" is <br /> <br />therefore determined as follows: <br /> <br />. <br /> <br />Estimate Cost of Yardstick System <br /> <br />$176,245,000, <br />16,100,000 <br />(24.000.000) <br />$168.345,000 <br /> <br />',f <br /> <br />USBR Estimated Cost <br /> <br />. <br /> <br />Plus One Glen Canyon-Phoenix. 230 kv line <br /> <br />Less Two Glen Canyqn-Four Corners 230 kv lines <br /> <br />\. <br /> <br />. <br /> <br />The Bureau's estimated transmission investment required under the utilities' <br /> <br />proposal seems to be adequate. There is still. however, a definite question as to <br /> <br />I <br />I <br /> <br />the adequacy of the utilities' own transmission facilities. especially since those <br />