Weekly journal-miner., 1909-05-26
HYDRO-ELECTRICAL
 DEVELOPMENT IN ARIZONA
From Thursday's DaIIyl


 ma. Some mining companies have been obliged to pay as high as $25O per horsepower a year. An hydro-eleetric installation, which will very nearly cut in half the above figures, is now being
 rushed to completion on Fossil creek and the Verde river.
 The water rights for this develop 1nent have been located for the last 50 years, but no progress was made until a year ago, when the Arizona Power company took hold and immediately began work.
 Fossil creek is approximately nlne miles in length and it's source is at Fossil springs. These springs are seven m number and are all located within q radius of One-half mile. Accurate re- ,,ord has been kept of the flow, which has never fallen below 43 cubic feet second
 Two developments have been plan ned. the first one of which is now near 1y completed, and which is known as she lower. This development, which will be in operation within the next few months, takes up the water of Fossil creek three miles below the springs. The intake is in solid rock and runs up into the stream, thus elin- mating the necessity of a dam. A large spiIlway has been constructed to avoid flood waters; also sluiee gates and concrete sand boxes.
 The water conduit is little over seven miles in length, and consists of concrete and trestle fumes, syphon pipe line, gravity and pressure tunnels, and pressure pipe.
 Tbe dimensions of the concrete fluIr-.s are on the inside four feet wide and three and a half feet high. At the top, these fumes are four inches thick, and al the bottom, Six, inches. Throughout concrete fumes are rein forced with wire cloth. This constric- J.ions extends for distance of 15,5O0 tssszd
 W,goden fumes trestles are, in the main, constructed of six by six Oregon l pine, and Hume running boards and bot toms of two by twelve inches of the same material; 600 feet of Hume tres tles have been built.
 The syphOne pipe line varies in dlaln- pter from 42 inches to 4S inches, and | in thickness from 5-16 to 9-16 of an Eneh; this latter dimension applying se- eording to pressure. The object of con- strueting this pipe line is to avoid the necessity of building a Hume in order 10 carry the water through this rough | country, which would necessarily be at | 9east five miles in length, and by sy- 1phoning the water the line IS onIy 7 200 feet in length, with an attendant loss of moi more than 10 feet of head. Five structural iron trestles have been built in connection with his line.
 About 10,400 feet of tunnels form an important feature of the development. These tunnels are lined throughout with concrete, the clearance dimensions being three by six feet.
 The reservoir is located five miles from the intake and between the last section of the concrete Hume and the end of the pressure tunnel. This reser- voir has a capacity of 8 acre-feet, which Is approximately one days run for the plant. There is a short length of concrete pipe land from the lower mouth of the pressure tunnel to the inlet at the standpipe This standpipe, which Is llso constructed of concrete, rigidly re- nforeed with bar and band steel, is To- .ated at the head oS the pressure pipe, g 30 feet in diameter and 36 feet high, :. he wall being six inches thick.
 The pressure pipe line is 4,900 feet a length, being IS inches in diameter D nE ZIG of an inch thick at the top, nd -at the bottom the line is g inches a diameter and 1916 of an inch th7sk. = his pipe is anchored at all bends with :. 8rge blocks of concrete. The water Y onduit from the intake to the stand ipe or penstock has a grade of one =, oot in 1000. The total effective head r btainable on this lower development 5 iIJ0S7 feet.
 The power house equipment consists F, three units, comprising three 1900 ., sO-cyele, three-phase, A. T. >, ls-pole, e,3OO-volt G. E. generators, D irect connected to Doble water wheels. 'wo travelling cranes of 15 and 10 ons capacity are now in place, the TO- on crane being power driven. These ranes were of great assistance in han ,, ling the machinery and unloading anne from wagons.
 The Voltaoe is transformed fror1 l n'