Pacific service magazine . constructed. Allof this must be accomplished piece-meal,building into the existing network, withoutdisturbing its balance or interfering with itssuccessful operation. Not only must theoutput of the present plants be economicallyand elfectively handled, but considerationmust be given in advance to the disposal ofthe power from such future plants as arescheduled for construction at later dates. Itis frequently found economical, for instance,to construct a transmission line with re-serve capacity to care for projected careful planning, step by step,with t
Pacific service magazine . constructed. Allof this must be accomplished piece-meal,building into the existing network, withoutdisturbing its balance or interfering with itssuccessful operation. Not only must theoutput of the present plants be economicallyand elfectively handled, but considerationmust be given in advance to the disposal ofthe power from such future plants as arescheduled for construction at later dates. Itis frequently found economical, for instance,to construct a transmission line with re-serve capacity to care for projected careful planning, step by step,with the growth of generating facilities andthe expansion of the customers demands,the transmission and distribution networkwould soon become a hopeless tangle. A striking metaphor could be drawnabout this situation, in which the transmis-sions main high-voltage would become theexpress lines of an electric transportationsystem, tying in with a more numerousnetwork of local lines at certain transfer I 380 Pacific Service Magazine. points. The local lines after transportingtheir consignments to the local stations, inturn discharge into lesser distribution lines,representing the trucks and wagons of aretail delivery system. Following the transportation similefurther, it may be observed that passengersare assigned to express or local trains pri-marily in accordance with their destinationsand the distances which they are to Twentieth Century Limited will notstop to discharge one passenger at a flagstation, but requires him to dismount at thenearest express stop and to proceed to hisdestination by way of a local train. Muchthe same holds true of blocks of electricpower. The huge power output from thePit River developments, from Drum, Stan-islaus, Electra and the several lesser plantsis stepped up to high voltage for transmis-sion to the larger load centers, under ex-press right-of-way. It would be impossibleeconomically and most difficult technicallyto interrupt the flow of the
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