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<br />5"- I~' ':>~ <br /> <br />~ <br />M <br />~ <br />-' <br />C\J <br />C <br /> <br />ESTIMATED COST OF STEAM POWER AT MIDVALE, UTAH <br />COMPARED WITH <br />ESTIMATED COST OF BOUIDER DAM POWER AT LOS ANGELES, CALIFORNIA <br /> <br />1. For the purpose of this study it was assumed that elec- <br />trical energy generated near Midvale, Utah (located approximately mid- <br />way between Salt Lake City and several of the largest smelting centers) <br />would be fairly comparable as to cost with Boulder Dam power delivered <br />at Receiving Station "B" in Los Angeles, California. <br /> <br />2. The efficiency of a modern high pressure high temperature <br />steam plant equipped with cooling towers for condenser cooling water <br />is taken as about 90 per cent of the efficiency obtainable with a <br />plentirul supply of cold condenser cooling water or equivalent to <br />.4 bbl. of fuel oil per kilowatt per year plus fuel oil at 550 kilo- <br />watt hours per barrel. <br /> <br />3. Reliable sources of information advise that the present <br />price of 13,000 B.T.U. per pound coal in single carload lots delivered <br />at Salt Lake City at plant siding varies from $2.85 to $3.25 per ton. <br />In larger quantities the price at the mine is about $.20 per ton less. <br />For the purpose of this study the future price of coal with increased <br />use is taken at $2.50 per ton delivered at plant at Midvale, Utah, <br />which is equivalent to fuel oil at approximately $.60 per barrel. <br /> <br />4. The investment cost in a steam plant located at Midvale, <br />Utah, including step-up transformers and switching station and short <br />transmission to a recaiving station is taken at $87.50 per kilowatt <br />for an oil or gas burning plant plus $5.00 per kilowatt for coal burn- <br />ing equipment or $92.50 per kilowatt. <br /> <br />5. On the above assumptions, the cost of steam power gener- <br />ated at Midvale, Utah, and delivered at the receiving station for dis- <br />tribution to the load is equivalent to $8.73 per kilowatt peak demand <br />per year (or $.73 per kilowatt peak demand for month) plus 1.09 mills <br />per kilowatt hour utilized. This is based on amortizing the invest- <br />ment in 40 years with interest at 4 per cent; depreciation allowance <br />of 1.7 per cent of investment; $2.25 per kilowatt per annual operation <br />and maintenance expense; and ruel cost and economy as given in para- <br />graphs 2 and 3. <br /> <br />6. The cost of Boulder Dam power delivered at Receiving <br />Station "B" at Los Angeles including steam standby and with falling <br />water at 1.00 mills per kilowatt hour at Boulder Dam is equivalent to <br />$11.90 per kilowatt peak demand per year (or $.99 per kilowatt peak <br />demand per month) plus 1.08 mills per kilowatt hour (allowing 7.5 <br />per cent transmission losses). This is based on amortization of <br />generating machinery in 50 years with interest at 4 per cent; <br />amortization of transmission and steam standby investment in 40 <br />years with interest at 4 per cent; depreciation allowances of .7 <br /> <br />.1 <br />