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during the summer months of high water, of 7400 second feet minus 5500 | " Equal 3900 second feet. This surplus is stored in the reservoir and is used to supply the deficiency during the winter months, which would he 3500 second feet minus __Q z f l 1 | Equal 256^ second feet, continuous flow, which would leave us from,the 3900 second feet a surplus during the six months of high water, 1338 second feet continuous flow, which we can store in the Long Valley Reservoir, the capacity of which is ample, and have a reserve of waetveerr yo fy ear at least 30 per cent of the ara&unt required to produce the j power we figure on. If we take this continuous flow of water all the year round, of 3500 second feet, and drop: it 2000 feet to the j power house, we obtain a result of 646,000 horse power^js# the water-wheels, from which we have to further deduct for losses in transforming to electric power, and transmission to Los ~t~ ^ || Angeles, of 15 per cent, or deduct from the above horse power 96,969, which leaves 558,495 effective electrical horse power I delivered in Los Angeles; or, in round numbers, 550,000. | THE PROBABLE COST.- Of course when I speak of the probable cost, as well as of the capacity, and different methods of construction, I must beg to call your attention to the following fact, namely, that I have based the entire report upon my observations obtained during examination and reconnoissance survey made with 8