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C',J .... t:) e"! c: . /" dl1:'t<, J J,,;;e. r . ' R /J .. ~:~~~i!' jt,/ ~~ ~ ~ '..J )'!;'- .(ie'!;. '. *,) '''''A~' '\<'~.' " f' "'. ~.u... ,;nJ /1' J ;; J:?,l, ./ RESUME OF INSPECTION TRIP THROUGH THE LOWER COLORADO RIVER BASIN > ;1 " ; i < On December 5, 1958, the undersigned, accompanied by R. M. Gildersleeve were conducted on a tour of Hoover Dam by the U. S. B. R. The items of prime interest that resulted from thi~ tour is the fact that: 1. Of the 16 generators installed at Hoover only four are interconnected with the Davis-Parker power system. The other generators are used to serve the allottee- owners directly. This results in an inefficiency in water utilization in that the full capacity, and thereby full efficiency, of the generators are not realized. Under such a system, for example, two allottees may each have a generator operating at, say 40% capacity when one generator could serve both at a much greater efficiency, thereby realizing more energy from the same amount of water passed through. 2. Six of the generators are combination 50 and 60 cycle units although they produce 60 cycle current now. The type of turbine runner for the combination type gen- erator is quite inefficient, as regards water use, and could now be replaced by a more efficient runner. 3. The allottees are using Hoover power for peaking. The peaks are, of course, uncontrollable thereby causing a loss of control over water released. This may account, at least in part, for the alleged in- ability to control water releases to Mexico. 4. On this date Hoover was discharging 25,000 cfs during daytime hours and 35,000 cfs during the night - to produce contract firm energy. ~ ~, ,', " , ~ r ~ ~ ~ ~ t'. ;:: " ~ ., ~.~ , " ~~ ~i ,~ .~- ~~ :.::' ~ ~ p .,' ;j ~ ~ l!i ~{ t;~ ~i ~ ~ , ~~ ~l*" ~t~ On December 6th, Mr. Gildersleeve, Mr. John Barnard, Sr. and the undersigned visited Parker Dam, Davis Dam and Headgate Rock Dam. Davis Dam was constructed primarily for the regula- tion of Mexican Treaty water, and to provide power incident to such regulation. The operator at Davis Dam confirmed the finding that only four of the Hoover Power/Plant generators are connected with Davis PowerlPlant. The pattern of opera- tion for Davis Dam is that it 1S filled by releases from Hoover during the winter months and then drawn down during the summer irrigating period to satisfy Mexican orders. At the time of our visit the reservoir lacked only from six to eight feet to being full. Parker Dam was constructed to provide a desilting ~~. ':'.y :~~ .:-- IJII"/J~ !<-./5 ,-