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<br />3. Method of Calculation. The calculations for a repayment study <br />are accomplished by use of high-speed digital computers. <br /> <br />Historical data are taken from records; however, projecting data for <br />future years is a complicated process which, of necessity, requires <br />judgment. <br /> <br />4. Results Summary. Table F-l summarizes the results of the CRSP <br />fiscal year 1974 study. This study summary is in the new format that <br />will be used for all future studies for all projects. <br /> <br />There are detailed calculations involved and many backup tabulations <br />which show the composition or derivation of the number shown in the <br />summary. The data on Table F-l are displayed to the nearest $1000 and <br />consequently, some of the arithmetical totals across or down the columns <br />may differ slightly from the data shown. Given below is a brief de- <br />scription of the basis for the numerical data in each of the columns on <br />Table F-l: <br /> <br />a. Dates. Columns 1 and 30 list the study year of the project. <br />The first date is the date when the first feature of the project went <br />into service. Columns 2 and 29 show the fiscal year involved. <br /> <br />b. Revenue, column 3. The total annual revenue is listed in <br />this column. Revenue is obtained from firm energy and capacity sales, <br />nonfirm energy sales, wheeling over the transmission system, rental of <br />facilities, and from other miscellaneous uses. The major source of <br />revenue is from firm energy and capacity sales and these revenues are <br />calculated from the amount of firm energy and dependable capacity avail- <br />able and the rates involved. Future power availability is obtained from <br />projections of generated energy based on past hydrological data and <br />expected water runoff, reduced by upstream depletions, and integrated <br />with power purchased. <br /> <br />c. Revenue deductions (columns 4 through 9). <br /> <br />(1) Operation and maintenace expenses, column 4. The <br />annual expense associated with operating and maintaining the projects' <br />power facilities is tabulated. That expense includes salaries of all <br />employees involved in direct operation of powerplants, substations, and <br />dispatch offices; in maintenance of powerplants, substations and trans- <br />mission lines; and the cost of supplies associated with maintenance. <br />Appropriate administrative, engineering, and other overhead costs are <br />also included. <br /> <br />(2) Purchased power expense, column 5. Data tabulated in <br />this column include the cost of firming energy and of energy to replace <br />deficiencies in generation at Hoover Powerplant due to water storage in <br />CRSP reservoirs. <br /> <br />42 <br />