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<br /> <br />. <br /> <br />. <br /> <br />. <br /> <br /> <br />o <br />( ''') <br /> <br />""'^' <br />Mh <br />..... <br />Q:) <br /> <br />i <br /> <br />-.t <br /> <br /> <br />10 <br /> <br />j <br />.\ <br />, <br />, <br /> <br />I <br />tojpay for a definite quantity 0# firm energy at 1.63 mllls <br />pe kWThr., whether used or not, and under the Third Oir- <br />cu t Contract, for a definite quantity of secondary ene~gy <br />unt 1 May 3l, 1945, at the rate of .5 mills. The incre~ <br />men al cost of energy in excess of the commitment, up to <br />the total option for secondary energy, 1s at the rate of .5 <br />mil S for second.n'y, whet'eas, if the Bureau owned the hy'liro <br />pl1. t, the total incremental cost at Boulder power plant in <br />dol rs would be unappreciable, or even zero. <br />A. H. Markwart, Vice President of the Pacifio Gas <br />and,lectric Oompany (in the September l, 1930 issue of <br />lJ.fUe trical WestlJ), made an economic study to determine 'the <br />prop rt10ns in which steam plants and hydro plants should <br /> <br />.'} <br /> <br /> <br />be b <br /> <br />serve growing load in order to realize maximum <br /> <br /> <br />over 11 system ec.onomy' based upon an annual system load <br />fact of 60%, and his study indicated that 70,% of tbe peak <br /> , <br /> hydro and 30,% " <br />shoul be carried by by steam, I have made a , <br />simil r study, using for the hydro tbe special costs per-, <br /> <br />taini g to the Boulder Canyon Project which shows that the <br />minim m cOst per kw-hr. delivered would be obtained under <br />the f llowing conditions: <br /> <br />" <br />.i <br /> <br />/i <br /> <br />F r a charge of l.63 millsl <br />k -hr. for falling water at <br />B ulder . <br /> <br />I the charge for falling <br />w ter is reduced to 1.~O mill <br /> <br />Percent of Peak Demand <br />Carried by Steam <br /> <br />,{ <br />~l <br /> <br />, <br />~,- <br />.j <br />., <br />; <br />1~ <br />';1 <br /> <br />100,% <br /> <br />30,% <br /> <br />A. B. Roberts <br /> <br />i <br />