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Show For purposes of cost allocation TVA since 1938 has set up three theoretical alternative single-pur- pose systems, capable of producing navigation, flood control, and power production results equivalent to those of the actual system. Finding the esti- mated annual costs of each alternative system less than the estimated benefits, each alternative system was found to be economically justified. The navigation system set up as an alternative consisted of 10 lock-dam-and-reservoir projects. These were at the same sites as the actual structures except that two dams were substituted for the Ken- tucky Dam on the lower river. The hypothetical dams would be at mile 39.6 and mile 114. There would be 11-foot channels, actual depth, and mini- mum width of the entire channel of 300 feet. The estimated costs are as follows: Project Mflc 39.6___ Mile 114..... Pickwick..... WUson...... Wheeler..... Guntersville. . Hales Bar___ Chickamauga Watts Bar___ Fort Loudoun Total... Estimated cost $32,000,000 28,000,000 18,048,000 22,168, 000 20,485,000 21, 482.000 12, 463,000 20, 731,000 16,327,000 25, 828,000 217, 532,000 Savings in dredging costs in the Mississippi sys- tem through the alternative Tennessee system would average $400,000 annually, which capi- talized at 5 percent is 8 million dollars, making a total justifiable expenditure of $225,532,000. The alternative theoretical flood control system consists of three dam and reservoir projects on the Tennessee at Kentucky, Wheeler, and Watts Bar, and six on the principal tributaries, at Norris, Cherokee, Douglas, Hiwassee, Fontana, and Nottely sites. These reservoirs would be empty except for stor- ing flood waters. The aggregate flood storage capacity would be 11,179,000 acre-feet, so the cost per acre-foot is $20.40. The actual 16-dam system has total storage of 11,162,000 acre-feet, and the latter multiplied by $20.40 gives the alternative ex- penditure for flood control, $227,704,000. Project Kentucky. Wheeler. . . Watts Bar. Norris. . .. Cherokee. . Douglas. . . Fontana. . Hiwassee.. Nottely. .. Total Estimated cost $78, 554,000 17, 348,000 16, 538,000 19,000,000 21, 302,000 30,694,000 27, 532,000 12, 501, 000 4, 532, 000 228,001,000 The alternative theoretical power system would include 12 hydroelectric plants, at Pickwick, Wil- son, Wheeler, Guntersville, Hales Bar, Watts Bar, Norris, Cherokee, Douglas, Fontana, Hiwassee, and Chatuge sites. The primary power from this sys- tem would closely approximate that now available from the multiple-purpose system and the 75 per- cent time secondary power would exceed that now available. Project Pickwick___ Wilson..... Wheeler___ Guntersvillc. Hales Bar. . Watts Bar. . Norris...... Cherokee... Douglas..... Fontana.... Hiwassee. .. Chatuge___ Total. Capacity Kilowatts 180,000 436,000 226, 800 97, 200 51,100 150,000 120, 000 90,000 90, 000 202,500 57,600 1,701,200 Estimated cost $30, 548, 000 43, 365,000 37, 908, 000 30, 691, 000 13, 699, 000 30, 376,000 31, 600, 000 30, 783, 000 40, 500, 000 72,190, 000 16,709,000 7,197, 000 385, 566, 000 This power system would produce 795,000 kilo- watts of continuous power, and 230,000 kilowatts of secondary power available 75 percent of the time. Value of secondary power is taken at three-eighths of the value of primary, the 230,000 kilowatts sec- ondary power thus being the equivalent of 86,000 kilowatts of primary power in value. The total available primary power equivalent is thus 881,000 741 |
