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<br />Oi)17~3 <br /> <br />The amounts of saleable energy, rates, gross and net revenues, <br />annual operation, maintenance and replacement costs of the power system <br />are shovln in table 12, PaYlOr Syst8m Average Hate and Repayment Study <br /> <br />110. 3-A. <br /> <br />8. (a) Question - In view of the experionce on the Colol'ado-Big <br />Thol:1pson project where it was found necessary to redesign the project <br />and substitute tunnels for originally proposed open cho.ooel pOYlOr <br />conduits, is there assurance that it vnll be praetieable to operate <br />the Arkansas pOVer cano.l of the proposed project ~s an open conduit <br />under iee cmd snov, conditions "hich Y;Quld prevail in ':,inter? <br /> <br />Answer - Oonsiderable study has been given to the problem of "inter <br />operation of the project porTer system. The conclusions dr;::.ym from these <br />studies indicate that the assumptions as to the reliability of the system <br />in ninter is not over optimistic. A mthem.lticul analysis of the heat <br />losses frOlil the pavwr cano.ls and forebays indico.tes an o.nticipated heat <br />loss from ,',ater passing through the poner s;ystem of 21 BTU per pound. <br />TIns loss is bp.scd on an air tenperature of 300 F beloH zero, an initial <br />water temporo.ture of 390 F (the temperature of ,ffiter at maxinlum density <br />such as would be dravm from th8 storag8 reservoir) and a wind velocity of <br />15 m.p.h. The computed heat loss represents the loss from a free Vlater <br />surface. The project pO~Dr system has been planned and facilities provided <br />for maint8nancc of a pemanent ice cover during the ,dnter months. This <br />ice cover v~uld n~terially reduce the loss of heat from the ~~ter in the <br />canals and forebays. Studies made by 1~. J. C. Stevens (Froceedings--ASCE, <br />December 1921) shon that no serious problOl'1s from f:uazil or anchor ice <br />would occur if the surface ice cover is maintained. <br /> <br />8.(b) Question - Assuming it is found necessary to substitute tunnels <br />for all or a portion of the proposed open canal poy,er conduits, how much <br />vrould the estimated cost of the proposed project be increased? <br /> <br />Answer - The terrain traversed by the pm,er conduits is such as to <br />preclude the substitution of tunnels for the pm"mr canals. If the canals <br />were replaced by covered conduits which ,';ould proserve the head available <br />fer pov~r generation the toto.l construction costs TIould be increased by <br />about 864,000,000. Such an increase in cost would render the project <br />infeasible. <br /> <br />9. Question_ <br /> <br />(a) "~at ~Duld be the cost delivered of fixed and operating <br />expenses, separo.tely and conbined, per o.cre foot of municipo.l 1c~ter supply <br /> <br />- 8 - <br />