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.' -',,_ ~r_- P, ~T , _ ~ "'-'~i;~:;;"':':--''''':<;~1':.' ~_. _. ',_.;.:" "I. ' .~':.~"7;'; -,c.' .: . _-y~~ -'!'Y~&:,'~_'?,-.~;~ ",;>::",.,.,...<, .;-~,~\-::.--._(. . #~-,':;"?;<i'....-.-,..,~t*<~ ?~'~4 -,:---.~-.-", '.,:.. -', ','.';!_ ~~"~>". -'. ~'?-'!-:,"2 ~- --': --'~-:'. -. ;;_,_::',;':2~~:';;1J.' .~_ ,- ~ 1 , ~ -i 25. ~ N N C'l C . income and expense. Ey knowledge of the Bureau's business leads me to believe that the load factor of the system will increase during 50 years and that an average of 55% may be safely used for studies of this nature over a period of 50 years. Cn page 6 of lir. Sandsl report he shows a total generating capacity of 987,000 kW, at an average load fac- tor of 49.4% which equals the firm obligation of 4,277,000,000 kw-hrs. per year. ~ith gt% loss as assumed by Mr. Sands this is an equivalent of 903,563 kw. delivered in Los Angeles. Cn page 10 of Mr. Sands I report he assumes a total installation of six transmission circuits, which would mean . that the delivered load on each circuit would be 150,930 kw. rhis is in excess of the safe transmission capacity for stability on the type of transmission system assumed by lir. Sands. ro provide the quality of service required in a large metropolitan ~rea, the safe delivered capacity should not m~terially exceed 120,000 kw. per circuit, which would require at least seven transmission circuits for primary energy only. While it is true some allocation of investment in generating capacity is allocable to secondary energy, this condition does not exist concerning transmission lines, for their capacity is not a variable like generating c~p~city which .is affected by the head in the reservoir. rhe matter . A. B. Roberts