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<br />. <br /> <br />. <br /> <br />. <br /> <br />Both generation and transmission facility additions are planned between 1982 <br />and 1991 that will increase the FY 1981 power investment from $538,215,000 to <br />about $1.1 billion. There are two principal additions projected in the FY <br />1981 study that account for most of the additional investments shown here. <br />Over $475,000,000 in power costs are associated with the Central Utah <br />Project, Bonneville Unit generating facilities, and almost $95,000,000 have <br />been included for the western Colorado 345-kV transmission system. <br /> <br />The total power investment of $1.1 billion is about $420 million greater than <br />was in the FY 1977 study. <br /> <br />As a result of the increase in power investments, interest expenses also <br />increase. The total interest cost in the 1981 study is over $566 million, an <br />increase of about $236 million since 1977. Four interest rates have been <br />used in the 1981 study. The current interest rate of 9.352% applies to the <br />western Colorado 345-kV transmission system. <br /> <br />An increase in power investments also increases the replacement costs. In <br />addition to having more facilities to replace, costs are higher as a result <br />of inflation. Inflation, of course, affects the estimated costs for all <br />future investments. <br /> <br />9 <br />