. Development and electrical distribution of water power . rder to accom-plish this, it will be necessary to build a tunnel 8 miles long, andwhen this is done there will be sufficient water for developingsome 38,000 From the reservoir the water is taken in a 38 X 56 inches wooden flume 8,800 feet long, laid on a grade of per cent., which empties into an intake reservoir. The intake reservoir has an area of about five acres. Its dam is of earth, with a 12 I78 DEVELOPMENT AND DISTRIBUTION OF WATER POWER concrete core wall 3 feet thick and another concrete wall at theinner toe. At prese
. Development and electrical distribution of water power . rder to accom-plish this, it will be necessary to build a tunnel 8 miles long, andwhen this is done there will be sufficient water for developingsome 38,000 From the reservoir the water is taken in a 38 X 56 inches wooden flume 8,800 feet long, laid on a grade of per cent., which empties into an intake reservoir. The intake reservoir has an area of about five acres. Its dam is of earth, with a 12 I78 DEVELOPMENT AND DISTRIBUTION OF WATER POWER concrete core wall 3 feet thick and another concrete wall at theinner toe. At present it is 30 feet high by about 100 feet long, butit is to be raised 10 feet, which will give an effective head of 970feet at the power-house. The pipe enters the intake reservoir 25 feet below the surfaceof the water, thereby avoiding any possibility of ice entering orblocking the pipe. In front of the pipe is located the usualscreen made of flat bars of steel. The end of the pipe is taperedto 60 inches in diameter; where it emerges from the dam it is 44. Fig. 89.—Animas Flume. inches, and has a gate valve and a 10-inch standpipe on the lowerside to admit air, so as to prevent any danger of collapsing thepipe in case the valve is rapidly closed. The standpipe passesthrough the gate-house and is enclosed in a wood flue. The heatfrom a stove in the gate-house passes through the flue and aroundthe standpipe to prevent the water in it from freezing. It would appear that nature had intentionally left an openingin the cliffs for a pipe line to come down from this reservoir to thepower-house. Starting at the top, where the elevation is 987 feet ANIMAS PLANT 179 above the station, the pipe is 44 inches in diameter by 3-16 in. thickand runs for some 800 feet, on a slight grade over the mountain toa point where the head is 125 feet and the pipe is thickened to \inches. From this point downward the metal in the pipe increases
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